Merge branch 'main' into feature/hardover-shelves

prisma/migrations/20260303000000_add_works_table/migration.sql

@@ -0,0 +1,42 @@
+-- CreateTable
+CREATE TABLE "works" (
+    "id" TEXT NOT NULL,
+    "title" TEXT NOT NULL,
+    "author" TEXT NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "works_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "work_asins" (
+    "id" TEXT NOT NULL,
+    "work_id" TEXT NOT NULL,
+    "asin" TEXT NOT NULL,
+    "narrator" TEXT,
+    "duration_minutes" INTEGER,
+    "is_canonical" BOOLEAN NOT NULL DEFAULT false,
+    "source" TEXT NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "work_asins_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "works_title_idx" ON "works"("title");
+
+-- CreateIndex
+CREATE INDEX "works_author_idx" ON "works"("author");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "work_asins_asin_key" ON "work_asins"("asin");
+
+-- CreateIndex
+CREATE INDEX "work_asins_work_id_idx" ON "work_asins"("work_id");
+
+-- CreateIndex
+CREATE INDEX "work_asins_asin_idx" ON "work_asins"("asin");
+
+-- AddForeignKey
+ALTER TABLE "work_asins" ADD CONSTRAINT "work_asins_work_id_fkey" FOREIGN KEY ("work_id") REFERENCES "works"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/migrations/20260303100000_add_watched_series_authors/migration.sql

@@ -0,0 +1,51 @@
+-- CreateTable
+CREATE TABLE "watched_series" (
+    "id" TEXT NOT NULL,
+    "user_id" TEXT NOT NULL,
+    "series_asin" TEXT NOT NULL,
+    "series_title" TEXT NOT NULL,
+    "cover_art_url" TEXT,
+    "last_checked_at" TIMESTAMP(3),
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "watched_series_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "watched_authors" (
+    "id" TEXT NOT NULL,
+    "user_id" TEXT NOT NULL,
+    "author_asin" TEXT NOT NULL,
+    "author_name" TEXT NOT NULL,
+    "cover_art_url" TEXT,
+    "last_checked_at" TIMESTAMP(3),
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "watched_authors_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "watched_series_user_id_idx" ON "watched_series"("user_id");
+
+-- CreateIndex
+CREATE INDEX "watched_series_series_asin_idx" ON "watched_series"("series_asin");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "watched_series_user_id_series_asin_key" ON "watched_series"("user_id", "series_asin");
+
+-- CreateIndex
+CREATE INDEX "watched_authors_user_id_idx" ON "watched_authors"("user_id");
+
+-- CreateIndex
+CREATE INDEX "watched_authors_author_asin_idx" ON "watched_authors"("author_asin");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "watched_authors_user_id_author_asin_key" ON "watched_authors"("user_id", "author_asin");
+
+-- AddForeignKey
+ALTER TABLE "watched_series" ADD CONSTRAINT "watched_series_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "watched_authors" ADD CONSTRAINT "watched_authors_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -69,6 +69,8 @@ model User {
   hardcoverShelves        HardcoverShelf[]
   reportedIssues          ReportedIssue[]          @relation("Reporter")
   resolvedIssues          ReportedIssue[]          @relation("Resolver")
+  watchedSeries           WatchedSeries[]
+  watchedAuthors          WatchedAuthor[]
 
   @@index([plexId])
   @@index([role])
@@ -574,3 +576,87 @@ model HardcoverBookMapping {
   @@index([audibleAsin])
   @@map("hardcover_book_mappings")
 }
+
+// ============================================================================
+// WORKS TABLE
+// Cross-ASIN audiobook identity mapping — links multiple Audible ASINs
+// to a single logical work for library matching across editions.
+// Documentation: documentation/integrations/audible.md
+// ============================================================================
+
+model Work {
+  id        String     @id @default(uuid())
+  title     String
+  author    String
+  createdAt DateTime   @default(now()) @map("created_at")
+  updatedAt DateTime   @updatedAt @map("updated_at")
+
+  // Relations
+  asins WorkAsin[]
+
+  @@index([title])
+  @@index([author])
+  @@map("works")
+}
+
+model WorkAsin {
+  id              String   @id @default(uuid())
+  workId          String   @map("work_id")
+  asin            String   @unique
+  narrator        String?
+  durationMinutes Int?     @map("duration_minutes")
+  isCanonical     Boolean  @default(false) @map("is_canonical")
+  source          String   // 'dedup_auto' | 'admin_manual'
+  createdAt       DateTime @default(now()) @map("created_at")
+
+  // Relations
+  work Work @relation(fields: [workId], references: [id], onDelete: Cascade)
+
+  @@index([workId])
+  @@index([asin])
+  @@map("work_asins")
+}
+
+// ============================================================================
+// WATCHED LISTS TABLES
+// Per-user series and author subscriptions for automatic new-release requests.
+// Documentation: documentation/features/watched-lists.md
+// ============================================================================
+
+model WatchedSeries {
+  id            String    @id @default(uuid())
+  userId        String    @map("user_id")
+  seriesAsin    String    @map("series_asin")
+  seriesTitle   String    @map("series_title")
+  coverArtUrl   String?   @map("cover_art_url") @db.Text
+  lastCheckedAt DateTime? @map("last_checked_at")
+  createdAt     DateTime  @default(now()) @map("created_at")
+  updatedAt     DateTime  @updatedAt @map("updated_at")
+
+  // Relations
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, seriesAsin])
+  @@index([userId])
+  @@index([seriesAsin])
+  @@map("watched_series")
+}
+
+model WatchedAuthor {
+  id            String    @id @default(uuid())
+  userId        String    @map("user_id")
+  authorAsin    String    @map("author_asin")
+  authorName    String    @map("author_name")
+  coverArtUrl   String?   @map("cover_art_url") @db.Text
+  lastCheckedAt DateTime? @map("last_checked_at")
+  createdAt     DateTime  @default(now()) @map("created_at")
+  updatedAt     DateTime  @updatedAt @map("updated_at")
+
+  // Relations
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, authorAsin])
+  @@index([userId])
+  @@index([authorAsin])
+  @@map("watched_authors")
+}

src/app/api/audiobooks/new-releases/route.ts

@@ -7,7 +7,7 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 import { prisma } from '@/lib/db';
-import { enrichAudiobooksWithMatches } from '@/lib/utils/audiobook-matcher';
+import { enrichAudiobooksWithMatches, getAvailableAsins } from '@/lib/utils/audiobook-matcher';
 import { getCurrentUser } from '@/lib/middleware/auth';
 import { RMABLogger } from '@/lib/utils/logger';
 
@@ -24,6 +24,7 @@ export async function GET(request: NextRequest) {
     const searchParams = request.nextUrl.searchParams;
     const page = parseInt(searchParams.get('page') || '1', 10);
     const limit = parseInt(searchParams.get('limit') || '20', 10);
+    const hideAvailable = searchParams.get('hideAvailable') === 'true';
 
     // Validate pagination parameters
     if (page < 1 || limit < 1 || limit > 100) {
@@ -38,12 +39,22 @@ export async function GET(request: NextRequest) {
 
     const skip = (page - 1) * limit;
 
+    // When hideAvailable is enabled, exclude ASINs that are in the library or have completed requests
+    let excludedAsins: string[] = [];
+    if (hideAvailable) {
+      const availableSet = await getAvailableAsins();
+      excludedAsins = [...availableSet];
+    }
+
+    const whereClause = {
+      isNewRelease: true,
+      ...(excludedAsins.length > 0 ? { asin: { notIn: excludedAsins } } : {}),
+    };
+
     // Query audible_cache for new release audiobooks
     const [audiobooks, totalCount] = await Promise.all([
       prisma.audibleCache.findMany({
-        where: {
+        where: whereClause,
-          isNewRelease: true,
-        },
         orderBy: {
           newReleaseRank: 'asc',
         },
@@ -66,9 +77,7 @@ export async function GET(request: NextRequest) {
         },
       }),
       prisma.audibleCache.count({
-        where: {
+        where: whereClause,
-          isNewRelease: true,
-        },
       }),
     ]);
 

src/app/api/audiobooks/popular/route.ts

@@ -7,7 +7,7 @@
 
 import { NextRequest, NextResponse } from 'next/server';
 import { prisma } from '@/lib/db';
-import { enrichAudiobooksWithMatches } from '@/lib/utils/audiobook-matcher';
+import { enrichAudiobooksWithMatches, getAvailableAsins } from '@/lib/utils/audiobook-matcher';
 import { getCurrentUser } from '@/lib/middleware/auth';
 import { RMABLogger } from '@/lib/utils/logger';
 
@@ -24,6 +24,7 @@ export async function GET(request: NextRequest) {
     const searchParams = request.nextUrl.searchParams;
     const page = parseInt(searchParams.get('page') || '1', 10);
     const limit = parseInt(searchParams.get('limit') || '20', 10);
+    const hideAvailable = searchParams.get('hideAvailable') === 'true';
 
     // Validate pagination parameters
     if (page < 1 || limit < 1 || limit > 100) {
@@ -38,12 +39,22 @@ export async function GET(request: NextRequest) {
 
     const skip = (page - 1) * limit;
 
+    // When hideAvailable is enabled, exclude ASINs that are in the library or have completed requests
+    let excludedAsins: string[] = [];
+    if (hideAvailable) {
+      const availableSet = await getAvailableAsins();
+      excludedAsins = [...availableSet];
+    }
+
+    const whereClause = {
+      isPopular: true,
+      ...(excludedAsins.length > 0 ? { asin: { notIn: excludedAsins } } : {}),
+    };
+
     // Query audible_cache for popular audiobooks
     const [audiobooks, totalCount] = await Promise.all([
       prisma.audibleCache.findMany({
-        where: {
+        where: whereClause,
-          isPopular: true,
-        },
         orderBy: {
           popularRank: 'asc',
         },
@@ -66,9 +77,7 @@ export async function GET(request: NextRequest) {
         },
       }),
       prisma.audibleCache.count({
-        where: {
+        where: whereClause,
-          isPopular: true,
-        },
       }),
     ]);
 

src/app/api/audiobooks/search/route.ts

@@ -6,6 +6,8 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getAudibleService } from '@/lib/integrations/audible.service';
 import { enrichAudiobooksWithMatches } from '@/lib/utils/audiobook-matcher';
+import { deduplicateAndCollectGroups } from '@/lib/utils/deduplicate-audiobooks';
+import { persistDedupGroups } from '@/lib/services/works.service';
 import { getCurrentUser } from '@/lib/middleware/auth';
 import { RMABLogger } from '@/lib/utils/logger';
 
@@ -38,14 +40,22 @@ export async function GET(request: NextRequest) {
     const currentUser = getCurrentUser(request);
     const userId = currentUser?.sub || undefined;
 
+    // Deduplicate before enrichment to avoid wasted DB queries on duplicate entries
+    const { books: dedupedResults, groups } = deduplicateAndCollectGroups(results.results);
+
+    // Fire-and-forget: persist dedup groups to works table for cross-ASIN matching
+    if (groups.length > 0) {
+      persistDedupGroups(groups).catch(() => {});
+    }
+
     // Enrich search results with availability and request status information
-    const enrichedResults = await enrichAudiobooksWithMatches(results.results, userId);
+    const enrichedResults = await enrichAudiobooksWithMatches(dedupedResults, userId);
 
     return NextResponse.json({
       success: true,
       query: results.query,
       results: enrichedResults,
-      totalResults: results.totalResults,
+      totalResults: enrichedResults.length,
       page: results.page,
       hasMore: results.hasMore,
     });

src/app/api/authors/[asin]/books/route.ts

@@ -6,6 +6,8 @@
 import { NextRequest, NextResponse } from 'next/server';
 import { getAudibleService } from '@/lib/integrations/audible.service';
 import { enrichAudiobooksWithMatches } from '@/lib/utils/audiobook-matcher';
+import { deduplicateAndCollectGroups } from '@/lib/utils/deduplicate-audiobooks';
+import { persistDedupGroups } from '@/lib/services/works.service';
 import { getCurrentUser } from '@/lib/middleware/auth';
 import { RMABLogger } from '@/lib/utils/logger';
 
@@ -53,9 +55,17 @@ export async function GET(
     const audibleService = getAudibleService();
     const result = await audibleService.searchByAuthorAsin(authorName.trim(), asin, page);
 
+    // Deduplicate before enrichment to avoid wasted DB queries on duplicate entries
+    const { books: dedupedBooks, groups } = deduplicateAndCollectGroups(result.books);
+
+    // Fire-and-forget: persist dedup groups to works table for cross-ASIN matching
+    if (groups.length > 0) {
+      persistDedupGroups(groups).catch(() => {});
+    }
+
     // Enrich with library availability and request status
     const userId = currentUser.sub || undefined;
-    const enrichedBooks = await enrichAudiobooksWithMatches(result.books, userId);
+    const enrichedBooks = await enrichAudiobooksWithMatches(dedupedBooks, userId);
 
     logger.info(`Author books complete: "${authorName}" → ${enrichedBooks.length} books (page ${page})`);
 
@@ -64,7 +74,7 @@ export async function GET(
       books: enrichedBooks,
       authorName: authorName.trim(),
       authorAsin: asin,
-      totalBooks: result.totalResults || enrichedBooks.length,
+      totalBooks: enrichedBooks.length,
       hasMore: result.hasMore,
       page: result.page,
     });

src/app/api/series/[asin]/route.ts

@@ -8,6 +8,8 @@ import { getCurrentUser } from '@/lib/middleware/auth';
 import { RMABLogger } from '@/lib/utils/logger';
 import { scrapeSeriesPage } from '@/lib/integrations/audible-series';
 import { enrichAudiobooksWithMatches } from '@/lib/utils/audiobook-matcher';
+import { deduplicateAndCollectGroups } from '@/lib/utils/deduplicate-audiobooks';
+import { persistDedupGroups } from '@/lib/services/works.service';
 
 const logger = RMABLogger.create('API.Series.Detail');
 
@@ -49,9 +51,17 @@ export async function GET(
       );
     }
 
+    // Deduplicate before enrichment to avoid wasted DB queries on duplicate entries
+    const { books: dedupedBooks, groups } = deduplicateAndCollectGroups(detail.books);
+
+    // Fire-and-forget: persist dedup groups to works table for cross-ASIN matching
+    if (groups.length > 0) {
+      persistDedupGroups(groups).catch(() => {});
+    }
+
     // Enrich books with library availability and request status
     const userId = currentUser.sub || undefined;
-    const enrichedBooks = await enrichAudiobooksWithMatches(detail.books, userId);
+    const enrichedBooks = await enrichAudiobooksWithMatches(dedupedBooks, userId);
 
     logger.info(`Series detail complete: "${detail.title}" (${enrichedBooks.length} books, page ${page})`);
 

src/app/api/user/watched-authors/[id]/route.ts

@@ -0,0 +1,52 @@
+/**
+ * Component: Watched Author Delete Route
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { RMABLogger } from '@/lib/utils/logger';
+
+const logger = RMABLogger.create('API.WatchedAuthors');
+
+/**
+ * DELETE /api/user/watched-authors/[id]
+ * Remove an author from the user's watch list (ownership check)
+ */
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const { id } = await params;
+
+      const watched = await prisma.watchedAuthor.findUnique({
+        where: { id },
+      });
+
+      if (!watched) {
+        return NextResponse.json({ error: 'Watched author not found' }, { status: 404 });
+      }
+
+      // Ownership check
+      if (watched.userId !== req.user.id) {
+        return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+      }
+
+      await prisma.watchedAuthor.delete({ where: { id } });
+
+      logger.info(`User ${req.user.id} stopped watching author "${watched.authorName}" (${watched.authorAsin})`);
+
+      return NextResponse.json({ success: true });
+    } catch (error) {
+      logger.error('Failed to delete watched author', { error: error instanceof Error ? error.message : String(error) });
+      return NextResponse.json({ error: 'Failed to delete watched author' }, { status: 500 });
+    }
+  });
+}

src/app/api/user/watched-authors/route.ts

@@ -0,0 +1,125 @@
+/**
+ * Component: Watched Authors API Routes
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { getJobQueueService } from '@/lib/services/job-queue.service';
+import { z } from 'zod';
+import { RMABLogger } from '@/lib/utils/logger';
+
+const logger = RMABLogger.create('API.WatchedAuthors');
+
+const AddWatchedAuthorSchema = z.object({
+  authorAsin: z.string().regex(/^[A-Z0-9]{10}$/, 'Invalid author ASIN'),
+  authorName: z.string().min(1).max(500),
+  coverArtUrl: z.string().url().optional(),
+});
+
+/**
+ * GET /api/user/watched-authors
+ * List the current user's watched authors
+ */
+export async function GET(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const authors = await prisma.watchedAuthor.findMany({
+        where: { userId: req.user.id },
+        orderBy: { createdAt: 'desc' },
+      });
+
+      return NextResponse.json({
+        success: true,
+        authors: authors.map((a) => ({
+          id: a.id,
+          authorAsin: a.authorAsin,
+          authorName: a.authorName,
+          coverArtUrl: a.coverArtUrl,
+          lastCheckedAt: a.lastCheckedAt,
+          createdAt: a.createdAt,
+        })),
+      });
+    } catch (error) {
+      logger.error('Failed to list watched authors', { error: error instanceof Error ? error.message : String(error) });
+      return NextResponse.json({ error: 'Failed to list watched authors' }, { status: 500 });
+    }
+  });
+}
+
+/**
+ * POST /api/user/watched-authors
+ * Add an author to the user's watch list
+ */
+export async function POST(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const body = await req.json();
+      const { authorAsin, authorName, coverArtUrl } = AddWatchedAuthorSchema.parse(body);
+
+      // Check for duplicate
+      const existing = await prisma.watchedAuthor.findUnique({
+        where: { userId_authorAsin: { userId: req.user.id, authorAsin } },
+      });
+
+      if (existing) {
+        return NextResponse.json(
+          { error: 'AlreadyWatching', message: 'You are already watching this author' },
+          { status: 409 }
+        );
+      }
+
+      const watched = await prisma.watchedAuthor.create({
+        data: {
+          userId: req.user.id,
+          authorAsin,
+          authorName,
+          coverArtUrl: coverArtUrl || null,
+        },
+      });
+
+      logger.info(`User ${req.user.id} started watching author "${authorName}" (${authorAsin})`);
+
+      // Trigger immediate targeted check for this author (fire-and-forget)
+      try {
+        const jobQueue = getJobQueueService();
+        await jobQueue.addCheckWatchedItemJob(req.user.id, undefined, authorAsin);
+        logger.info(`Triggered immediate check for watched author "${authorName}" (${authorAsin})`);
+      } catch (error) {
+        logger.error('Failed to trigger immediate watched author check', { error: error instanceof Error ? error.message : String(error) });
+      }
+
+      return NextResponse.json({
+        success: true,
+        author: {
+          id: watched.id,
+          authorAsin: watched.authorAsin,
+          authorName: watched.authorName,
+          coverArtUrl: watched.coverArtUrl,
+          lastCheckedAt: watched.lastCheckedAt,
+          createdAt: watched.createdAt,
+        },
+      }, { status: 201 });
+    } catch (error) {
+      logger.error('Failed to add watched author', { error: error instanceof Error ? error.message : String(error) });
+
+      if (error instanceof z.ZodError) {
+        return NextResponse.json(
+          { error: 'ValidationError', details: error.errors },
+          { status: 400 }
+        );
+      }
+
+      return NextResponse.json({ error: 'Failed to add watched author' }, { status: 500 });
+    }
+  });
+}

src/app/api/user/watched-series/[id]/route.ts

@@ -0,0 +1,52 @@
+/**
+ * Component: Watched Series Delete Route
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { RMABLogger } from '@/lib/utils/logger';
+
+const logger = RMABLogger.create('API.WatchedSeries');
+
+/**
+ * DELETE /api/user/watched-series/[id]
+ * Remove a series from the user's watch list (ownership check)
+ */
+export async function DELETE(
+  request: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const { id } = await params;
+
+      const watched = await prisma.watchedSeries.findUnique({
+        where: { id },
+      });
+
+      if (!watched) {
+        return NextResponse.json({ error: 'Watched series not found' }, { status: 404 });
+      }
+
+      // Ownership check
+      if (watched.userId !== req.user.id) {
+        return NextResponse.json({ error: 'Forbidden' }, { status: 403 });
+      }
+
+      await prisma.watchedSeries.delete({ where: { id } });
+
+      logger.info(`User ${req.user.id} stopped watching series "${watched.seriesTitle}" (${watched.seriesAsin})`);
+
+      return NextResponse.json({ success: true });
+    } catch (error) {
+      logger.error('Failed to delete watched series', { error: error instanceof Error ? error.message : String(error) });
+      return NextResponse.json({ error: 'Failed to delete watched series' }, { status: 500 });
+    }
+  });
+}

src/app/api/user/watched-series/route.ts

@@ -0,0 +1,125 @@
+/**
+ * Component: Watched Series API Routes
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { requireAuth, AuthenticatedRequest } from '@/lib/middleware/auth';
+import { prisma } from '@/lib/db';
+import { getJobQueueService } from '@/lib/services/job-queue.service';
+import { z } from 'zod';
+import { RMABLogger } from '@/lib/utils/logger';
+
+const logger = RMABLogger.create('API.WatchedSeries');
+
+const AddWatchedSeriesSchema = z.object({
+  seriesAsin: z.string().regex(/^[A-Z0-9]{10}$/, 'Invalid series ASIN'),
+  seriesTitle: z.string().min(1).max(500),
+  coverArtUrl: z.string().url().optional(),
+});
+
+/**
+ * GET /api/user/watched-series
+ * List the current user's watched series
+ */
+export async function GET(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const series = await prisma.watchedSeries.findMany({
+        where: { userId: req.user.id },
+        orderBy: { createdAt: 'desc' },
+      });
+
+      return NextResponse.json({
+        success: true,
+        series: series.map((s) => ({
+          id: s.id,
+          seriesAsin: s.seriesAsin,
+          seriesTitle: s.seriesTitle,
+          coverArtUrl: s.coverArtUrl,
+          lastCheckedAt: s.lastCheckedAt,
+          createdAt: s.createdAt,
+        })),
+      });
+    } catch (error) {
+      logger.error('Failed to list watched series', { error: error instanceof Error ? error.message : String(error) });
+      return NextResponse.json({ error: 'Failed to list watched series' }, { status: 500 });
+    }
+  });
+}
+
+/**
+ * POST /api/user/watched-series
+ * Add a series to the user's watch list
+ */
+export async function POST(request: NextRequest) {
+  return requireAuth(request, async (req: AuthenticatedRequest) => {
+    try {
+      if (!req.user) {
+        return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+      }
+
+      const body = await req.json();
+      const { seriesAsin, seriesTitle, coverArtUrl } = AddWatchedSeriesSchema.parse(body);
+
+      // Check for duplicate
+      const existing = await prisma.watchedSeries.findUnique({
+        where: { userId_seriesAsin: { userId: req.user.id, seriesAsin } },
+      });
+
+      if (existing) {
+        return NextResponse.json(
+          { error: 'AlreadyWatching', message: 'You are already watching this series' },
+          { status: 409 }
+        );
+      }
+
+      const watched = await prisma.watchedSeries.create({
+        data: {
+          userId: req.user.id,
+          seriesAsin,
+          seriesTitle,
+          coverArtUrl: coverArtUrl || null,
+        },
+      });
+
+      logger.info(`User ${req.user.id} started watching series "${seriesTitle}" (${seriesAsin})`);
+
+      // Trigger immediate targeted check for this series (fire-and-forget)
+      try {
+        const jobQueue = getJobQueueService();
+        await jobQueue.addCheckWatchedItemJob(req.user.id, seriesAsin);
+        logger.info(`Triggered immediate check for watched series "${seriesTitle}" (${seriesAsin})`);
+      } catch (error) {
+        logger.error('Failed to trigger immediate watched series check', { error: error instanceof Error ? error.message : String(error) });
+      }
+
+      return NextResponse.json({
+        success: true,
+        series: {
+          id: watched.id,
+          seriesAsin: watched.seriesAsin,
+          seriesTitle: watched.seriesTitle,
+          coverArtUrl: watched.coverArtUrl,
+          lastCheckedAt: watched.lastCheckedAt,
+          createdAt: watched.createdAt,
+        },
+      }, { status: 201 });
+    } catch (error) {
+      logger.error('Failed to add watched series', { error: error instanceof Error ? error.message : String(error) });
+
+      if (error instanceof z.ZodError) {
+        return NextResponse.json(
+          { error: 'ValidationError', details: error.errors },
+          { status: 400 }
+        );
+      }
+
+      return NextResponse.json({ error: 'Failed to add watched series' }, { status: 500 });
+    }
+  });
+}

src/app/page.tsx

@@ -5,12 +5,12 @@
 
 'use client';
 
-import { useState, useRef, useMemo } from 'react';
+import { useState, useRef, useEffect } from 'react';
 import { Header } from '@/components/layout/Header';
 import { AudiobookGrid } from '@/components/audiobooks/AudiobookGrid';
-import { useAudiobooks, Audiobook } from '@/lib/hooks/useAudiobooks';
+import { useAudiobooks } from '@/lib/hooks/useAudiobooks';
 import { ProtectedRoute } from '@/components/auth/ProtectedRoute';
-import { StickyPagination } from '@/components/ui/StickyPagination';
+import { UnifiedPagination } from '@/components/ui/UnifiedPagination';
 import { SectionToolbar } from '@/components/ui/SectionToolbar';
 import { usePreferences } from '@/contexts/PreferencesContext';
 
@@ -29,24 +29,20 @@ export default function HomePage() {
     isLoading: loadingPopular,
     totalPages: popularTotalPages,
     message: popularMessage,
-  } = useAudiobooks('popular', 20, popularPage);
+  } = useAudiobooks('popular', 20, popularPage, hideAvailable);
 
   const {
     audiobooks: newReleases,
     isLoading: loadingNewReleases,
     totalPages: newReleasesTotalPages,
     message: newReleasesMessage,
-  } = useAudiobooks('new-releases', 20, newReleasesPage);
+  } = useAudiobooks('new-releases', 20, newReleasesPage, hideAvailable);
 
-  // Filter out available titles when hideAvailable is enabled
+  // Reset to page 1 when hideAvailable changes (total pages may differ)
-  const filteredPopular = useMemo(
+  useEffect(() => {
-    () => hideAvailable ? popular.filter((b: Audiobook) => !b.isAvailable && b.requestStatus !== 'completed') : popular,
+    setPopularPage(1);
-    [popular, hideAvailable]
+    setNewReleasesPage(1);
-  );
+  }, [hideAvailable]);
-  const filteredNewReleases = useMemo(
-    () => hideAvailable ? newReleases.filter((b: Audiobook) => !b.isAvailable && b.requestStatus !== 'completed') : newReleases,
-    [newReleases, hideAvailable]
-  );
 
   // Handle page changes with auto-scroll to section top
   const handlePopularPageChange = (page: number) => {
@@ -100,7 +96,7 @@ export default function HomePage() {
               </div>
             ) : (
               <AudiobookGrid
-                audiobooks={filteredPopular}
+                audiobooks={popular}
                 isLoading={loadingPopular}
                 emptyMessage="No popular audiobooks available"
                 cardSize={cardSize}
@@ -145,7 +141,7 @@ export default function HomePage() {
               </div>
             ) : (
               <AudiobookGrid
-                audiobooks={filteredNewReleases}
+                audiobooks={newReleases}
                 isLoading={loadingNewReleases}
                 emptyMessage="No new releases available"
                 cardSize={cardSize}
@@ -181,22 +177,31 @@ export default function HomePage() {
         </div>
       </footer>
 
-      {/* Sticky Pagination Controls */}
+      {/* Unified Pagination — single context-aware pill for both sections */}
-      <StickyPagination
+      <UnifiedPagination
-        currentPage={popularPage}
-        totalPages={popularTotalPages}
-        onPageChange={handlePopularPageChange}
-        sectionRef={popularSectionRef}
         footerRef={footerRef}
-        label="Popular Audiobooks"
+        sections={[
-      />
+          {
-      <StickyPagination
+            label: 'Popular Audiobooks',
-        currentPage={newReleasesPage}
+            accentColor: 'bg-blue-500',
-        totalPages={newReleasesTotalPages}
+            currentPage: popularPage,
-        onPageChange={handleNewReleasesPageChange}
+            totalPages: popularTotalPages,
-        sectionRef={newReleasesSectionRef}
+            onPageChange: handlePopularPageChange,
-        footerRef={footerRef}
+            sectionRef: popularSectionRef,
-        label="New Releases"
+            onScrollToSection: () =>
+              popularSectionRef.current?.scrollIntoView({ behavior: 'smooth', block: 'start' }),
+          },
+          {
+            label: 'New Releases',
+            accentColor: 'bg-emerald-500',
+            currentPage: newReleasesPage,
+            totalPages: newReleasesTotalPages,
+            onPageChange: handleNewReleasesPageChange,
+            sectionRef: newReleasesSectionRef,
+            onScrollToSection: () =>
+              newReleasesSectionRef.current?.scrollIntoView({ behavior: 'smooth', block: 'start' }),
+          },
+        ]}
       />
       </div>
     </ProtectedRoute>

src/app/profile/page.tsx

@@ -12,6 +12,7 @@ import { useAuth } from '@/contexts/AuthContext';
 import { useRequests } from '@/lib/hooks/useRequests';
 import { cn } from '@/lib/utils/cn';
 import { ShelvesSection } from '@/components/profile/ShelvesSection';
+import { WatchedSeriesSection, WatchedAuthorsSection } from '@/components/profile/WatchedListsSection';
 
 const statConfig = [
   { key: 'total', label: 'Total', color: 'text-gray-900 dark:text-white' },
@@ -142,6 +143,12 @@ export default function ProfilePage() {
         {/* Generic Shelves Section */}
         <ShelvesSection />
 
+        {/* Watched Series */}
+        <WatchedSeriesSection />
+
+        {/* Watched Authors */}
+        <WatchedAuthorsSection />
+
         {/* Active Downloads */}
         {activeDownloads.length > 0 && (
           <section>

src/components/authors/AuthorDetailCard.tsx

@@ -11,6 +11,7 @@
 import React, { useState } from 'react';
 import Image from 'next/image';
 import { AuthorDetail } from '@/lib/hooks/useAuthors';
+import { WatchAuthorButton } from '@/components/ui/WatchButton';
 
 interface AuthorDetailCardProps {
   author: AuthorDetail;
@@ -64,13 +65,14 @@ export function AuthorDetailCard({ author }: AuthorDetailCardProps) {
           </div>
         )}
 
-        {/* Audible Link */}
+        {/* Actions row: Audible link + Watch button */}
+        <div className="mt-3 flex flex-wrap items-center justify-center sm:justify-start gap-3">
           {author.audibleUrl && (
             <a
               href={author.audibleUrl}
               target="_blank"
               rel="noopener noreferrer"
-            className="mt-3 inline-flex items-center gap-1.5 text-sm text-gray-500 dark:text-gray-400 hover:text-indigo-600 dark:hover:text-indigo-400 transition-colors"
+              className="inline-flex items-center gap-1.5 text-sm text-gray-500 dark:text-gray-400 hover:text-indigo-600 dark:hover:text-indigo-400 transition-colors"
             >
               View on Audible
               <svg className="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
@@ -78,6 +80,12 @@ export function AuthorDetailCard({ author }: AuthorDetailCardProps) {
               </svg>
             </a>
           )}
+          <WatchAuthorButton
+            authorAsin={author.asin}
+            authorName={author.name}
+            coverArtUrl={author.image}
+          />
+        </div>
 
         {/* Description */}
         {author.description && (

src/components/profile/WatchedListsSection.tsx

@@ -0,0 +1,323 @@
+/**
+ * Component: Watched Lists Section (Profile Page)
+ * Documentation: documentation/features/watched-lists.md
+ *
+ * Shows the user's watched series and watched authors on their profile page
+ * with the ability to remove items.
+ */
+
+'use client';
+
+import React, { useState } from 'react';
+import { useRouter } from 'next/navigation';
+import Image from 'next/image';
+import { useWatchedSeries, useDeleteWatchedSeries, WatchedSeriesItem } from '@/lib/hooks/useWatchedSeries';
+import { useWatchedAuthors, useDeleteWatchedAuthor, WatchedAuthorItem } from '@/lib/hooks/useWatchedAuthors';
+import { usePreferences } from '@/contexts/PreferencesContext';
+
+function formatRelativeTime(dateStr: string | null): string {
+  if (!dateStr) return 'Never';
+  const date = new Date(dateStr);
+  const now = new Date();
+  const diffMs = now.getTime() - date.getTime();
+  const diffMins = Math.floor(diffMs / 60000);
+  if (diffMins < 1) return 'just now';
+  if (diffMins < 60) return `${diffMins}m ago`;
+  const diffHours = Math.floor(diffMins / 60);
+  if (diffHours < 24) return `${diffHours}h ago`;
+  const diffDays = Math.floor(diffHours / 24);
+  return `${diffDays}d ago`;
+}
+
+// ---------------------------------------------------------------------------
+// Watched Series Section
+// ---------------------------------------------------------------------------
+
+export function WatchedSeriesSection() {
+  const router = useRouter();
+  const { series, isLoading } = useWatchedSeries();
+  const { deleteSeries, isLoading: isDeleting } = useDeleteWatchedSeries();
+  const { squareCovers } = usePreferences();
+  const [confirmDeleteId, setConfirmDeleteId] = useState<string | null>(null);
+
+  const handleDelete = async (id: string) => {
+    try {
+      await deleteSeries(id);
+      setConfirmDeleteId(null);
+    } catch {
+      // Error handled by hook
+    }
+  };
+
+  if (isLoading) {
+    return (
+      <section>
+        <SectionHeader title="Watched Series" icon="series" count={null} />
+        <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
+          {[1, 2].map((i) => <CardSkeleton key={i} squareCovers={squareCovers} />)}
+        </div>
+      </section>
+    );
+  }
+
+  if (series.length === 0) return null;
+
+  return (
+    <section>
+      <SectionHeader title="Watched Series" icon="series" count={series.length} />
+      <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
+        {series.map((item) => (
+          <WatchedSeriesCard
+            key={item.id}
+            item={item}
+            squareCovers={squareCovers}
+            isDeleting={isDeleting && confirmDeleteId === item.id}
+            confirmingDelete={confirmDeleteId === item.id}
+            onNavigate={() => router.push(`/series/${item.seriesAsin}`)}
+            onConfirmDelete={() => setConfirmDeleteId(item.id)}
+            onCancelDelete={() => setConfirmDeleteId(null)}
+            onDelete={() => handleDelete(item.id)}
+          />
+        ))}
+      </div>
+    </section>
+  );
+}
+
+function WatchedSeriesCard({
+  item, squareCovers, isDeleting, confirmingDelete, onNavigate, onConfirmDelete, onCancelDelete, onDelete,
+}: {
+  item: WatchedSeriesItem;
+  squareCovers: boolean;
+  isDeleting: boolean;
+  confirmingDelete: boolean;
+  onNavigate: () => void;
+  onConfirmDelete: () => void;
+  onCancelDelete: () => void;
+  onDelete: () => void;
+}) {
+  return (
+    <div className="rounded-xl bg-white dark:bg-gray-800 border border-gray-100 dark:border-gray-700/50 p-4 flex gap-4 hover:shadow-sm transition-shadow">
+      {/* Cover */}
+      <button onClick={onNavigate} className="flex-shrink-0">
+        <div className={`relative w-14 ${squareCovers ? 'aspect-square' : 'aspect-[2/3]'} rounded-lg overflow-hidden bg-gradient-to-br from-emerald-100 to-teal-200 dark:from-emerald-900 dark:to-teal-900`}>
+          {item.coverArtUrl ? (
+            <Image src={item.coverArtUrl} alt={item.seriesTitle} fill className="object-cover" sizes="56px" />
+          ) : (
+            <div className="absolute inset-0 flex items-center justify-center">
+              <svg className="w-6 h-6 text-emerald-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M12 6.042A8.967 8.967 0 006 3.75c-1.052 0-2.062.18-3 .512v14.25A8.987 8.987 0 016 18c2.305 0 4.408.867 6 2.292m0-14.25a8.966 8.966 0 016-2.292c1.052 0 2.062.18 3 .512v14.25A8.987 8.987 0 0018 18a8.967 8.967 0 00-6 2.292m0-14.25v14.25" />
+              </svg>
+            </div>
+          )}
+        </div>
+      </button>
+
+      {/* Info */}
+      <div className="flex-1 min-w-0">
+        <button onClick={onNavigate} className="text-left">
+          <h3 className="font-semibold text-gray-900 dark:text-white truncate hover:text-emerald-600 dark:hover:text-emerald-400 transition-colors">
+            {item.seriesTitle}
+          </h3>
+        </button>
+        <p className="text-xs text-gray-400 dark:text-gray-500 mt-1">
+          Last checked: {formatRelativeTime(item.lastCheckedAt)}
+        </p>
+      </div>
+
+      {/* Delete */}
+      <div className="flex-shrink-0 flex items-center">
+        {confirmingDelete ? (
+          <div className="flex items-center gap-1">
+            <button
+              onClick={onDelete}
+              disabled={isDeleting}
+              className="px-2 py-1 text-xs font-medium text-red-600 bg-red-50 dark:bg-red-900/30 dark:text-red-400 rounded hover:bg-red-100 dark:hover:bg-red-900/50 transition-colors"
+            >
+              {isDeleting ? '...' : 'Remove'}
+            </button>
+            <button
+              onClick={onCancelDelete}
+              className="px-2 py-1 text-xs font-medium text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300 transition-colors"
+            >
+              Cancel
+            </button>
+          </div>
+        ) : (
+          <button
+            onClick={onConfirmDelete}
+            className="p-1.5 text-gray-400 hover:text-red-500 dark:text-gray-500 dark:hover:text-red-400 transition-colors rounded-lg hover:bg-gray-100 dark:hover:bg-gray-700/50"
+            title="Remove from watched"
+          >
+            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+            </svg>
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Watched Authors Section
+// ---------------------------------------------------------------------------
+
+export function WatchedAuthorsSection() {
+  const router = useRouter();
+  const { authors, isLoading } = useWatchedAuthors();
+  const { deleteAuthor, isLoading: isDeleting } = useDeleteWatchedAuthor();
+  const [confirmDeleteId, setConfirmDeleteId] = useState<string | null>(null);
+
+  const handleDelete = async (id: string) => {
+    try {
+      await deleteAuthor(id);
+      setConfirmDeleteId(null);
+    } catch {
+      // Error handled by hook
+    }
+  };
+
+  if (isLoading) {
+    return (
+      <section>
+        <SectionHeader title="Watched Authors" icon="author" count={null} />
+        <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
+          {[1, 2].map((i) => <CardSkeleton key={i} />)}
+        </div>
+      </section>
+    );
+  }
+
+  if (authors.length === 0) return null;
+
+  return (
+    <section>
+      <SectionHeader title="Watched Authors" icon="author" count={authors.length} />
+      <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
+        {authors.map((item) => (
+          <WatchedAuthorCard
+            key={item.id}
+            item={item}
+            isDeleting={isDeleting && confirmDeleteId === item.id}
+            confirmingDelete={confirmDeleteId === item.id}
+            onNavigate={() => router.push(`/authors/${item.authorAsin}`)}
+            onConfirmDelete={() => setConfirmDeleteId(item.id)}
+            onCancelDelete={() => setConfirmDeleteId(null)}
+            onDelete={() => handleDelete(item.id)}
+          />
+        ))}
+      </div>
+    </section>
+  );
+}
+
+function WatchedAuthorCard({
+  item, isDeleting, confirmingDelete, onNavigate, onConfirmDelete, onCancelDelete, onDelete,
+}: {
+  item: WatchedAuthorItem;
+  isDeleting: boolean;
+  confirmingDelete: boolean;
+  onNavigate: () => void;
+  onConfirmDelete: () => void;
+  onCancelDelete: () => void;
+  onDelete: () => void;
+}) {
+  return (
+    <div className="rounded-xl bg-white dark:bg-gray-800 border border-gray-100 dark:border-gray-700/50 p-4 flex gap-4 hover:shadow-sm transition-shadow">
+      {/* Avatar */}
+      <button onClick={onNavigate} className="flex-shrink-0">
+        <div className="relative w-14 h-14 rounded-full overflow-hidden bg-gradient-to-br from-blue-100 to-indigo-200 dark:from-blue-900 dark:to-indigo-900">
+          {item.coverArtUrl ? (
+            <Image src={item.coverArtUrl} alt={item.authorName} fill className="object-cover" sizes="56px" />
+          ) : (
+            <div className="absolute inset-0 flex items-center justify-center">
+              <svg className="w-6 h-6 text-blue-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={1.5} d="M15.75 6a3.75 3.75 0 11-7.5 0 3.75 3.75 0 017.5 0zM4.501 20.118a7.5 7.5 0 0114.998 0A17.933 17.933 0 0112 21.75c-2.676 0-5.216-.584-7.499-1.632z" />
+              </svg>
+            </div>
+          )}
+        </div>
+      </button>
+
+      {/* Info */}
+      <div className="flex-1 min-w-0 flex items-center">
+        <div>
+          <button onClick={onNavigate} className="text-left">
+            <h3 className="font-semibold text-gray-900 dark:text-white truncate hover:text-blue-600 dark:hover:text-blue-400 transition-colors">
+              {item.authorName}
+            </h3>
+          </button>
+          <p className="text-xs text-gray-400 dark:text-gray-500 mt-0.5">
+            Last checked: {formatRelativeTime(item.lastCheckedAt)}
+          </p>
+        </div>
+      </div>
+
+      {/* Delete */}
+      <div className="flex-shrink-0 flex items-center">
+        {confirmingDelete ? (
+          <div className="flex items-center gap-1">
+            <button
+              onClick={onDelete}
+              disabled={isDeleting}
+              className="px-2 py-1 text-xs font-medium text-red-600 bg-red-50 dark:bg-red-900/30 dark:text-red-400 rounded hover:bg-red-100 dark:hover:bg-red-900/50 transition-colors"
+            >
+              {isDeleting ? '...' : 'Remove'}
+            </button>
+            <button
+              onClick={onCancelDelete}
+              className="px-2 py-1 text-xs font-medium text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-300 transition-colors"
+            >
+              Cancel
+            </button>
+          </div>
+        ) : (
+          <button
+            onClick={onConfirmDelete}
+            className="p-1.5 text-gray-400 hover:text-red-500 dark:text-gray-500 dark:hover:text-red-400 transition-colors rounded-lg hover:bg-gray-100 dark:hover:bg-gray-700/50"
+            title="Remove from watched"
+          >
+            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
+            </svg>
+          </button>
+        )}
+      </div>
+    </div>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Shared Components
+// ---------------------------------------------------------------------------
+
+function SectionHeader({ title, icon, count }: { title: string; icon: 'series' | 'author'; count: number | null }) {
+  const gradientColors = icon === 'series'
+    ? 'from-emerald-500 to-teal-500'
+    : 'from-blue-500 to-indigo-500';
+
+  return (
+    <div className="flex items-center gap-3 mb-5">
+      <div className={`w-1 h-6 bg-gradient-to-b ${gradientColors} rounded-full`} />
+      <h2 className="text-xl font-bold text-gray-900 dark:text-white">
+        {title}
+      </h2>
+      {count !== null && (
+        <span className="text-sm text-gray-500 dark:text-gray-400">({count})</span>
+      )}
+    </div>
+  );
+}
+
+function CardSkeleton({ squareCovers }: { squareCovers?: boolean }) {
+  return (
+    <div className="rounded-xl bg-white dark:bg-gray-800 border border-gray-100 dark:border-gray-700/50 p-4 flex gap-4 animate-pulse">
+      <div className={`w-14 ${squareCovers ? 'aspect-square' : 'aspect-[2/3]'} rounded-lg bg-gray-200 dark:bg-gray-700`} />
+      <div className="flex-1 space-y-2 py-2">
+        <div className="h-4 bg-gray-200 dark:bg-gray-700 rounded w-3/4" />
+        <div className="h-3 bg-gray-200 dark:bg-gray-700 rounded w-1/2" />
+      </div>
+    </div>
+  );
+}

src/components/series/SeriesDetailCard.tsx

@@ -11,6 +11,7 @@
 import React, { useState } from 'react';
 import Image from 'next/image';
 import { SeriesDetail } from '@/lib/hooks/useSeries';
+import { WatchSeriesButton } from '@/components/ui/WatchButton';
 
 interface SeriesDetailCardProps {
   series: SeriesDetail;
@@ -91,13 +92,14 @@ export function SeriesDetailCard({ series, squareCovers = false }: SeriesDetailC
           </div>
         )}
 
-        {/* Audible Link */}
+        {/* Actions row: Audible link + Watch button */}
+        <div className="mt-3 flex flex-wrap items-center justify-center sm:justify-start gap-3">
           {series.audibleUrl && (
             <a
               href={series.audibleUrl}
               target="_blank"
               rel="noopener noreferrer"
-            className="mt-3 inline-flex items-center gap-1.5 text-sm text-gray-500 dark:text-gray-400 hover:text-indigo-600 dark:hover:text-indigo-400 transition-colors"
+              className="inline-flex items-center gap-1.5 text-sm text-gray-500 dark:text-gray-400 hover:text-indigo-600 dark:hover:text-indigo-400 transition-colors"
             >
               View on Audible
               <svg className="w-3.5 h-3.5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
@@ -105,6 +107,12 @@ export function SeriesDetailCard({ series, squareCovers = false }: SeriesDetailC
               </svg>
             </a>
           )}
+          <WatchSeriesButton
+            seriesAsin={series.asin}
+            seriesTitle={series.title}
+            coverArtUrl={series.books[0]?.coverArtUrl}
+          />
+        </div>
 
         {/* Description */}
         {series.description && (

src/components/ui/StickyPagination.tsx

@@ -1,170 +0,0 @@
-/**
- * Component: Sticky Pagination with Progress Bar
- * Documentation: documentation/frontend/components.md
- */
-
-'use client';
-
-import React, { useState, useEffect, useRef } from 'react';
-import { ChevronLeftIcon, ChevronRightIcon } from '@heroicons/react/24/outline';
-
-interface StickyPaginationProps {
-  currentPage: number;
-  totalPages: number;
-  onPageChange: (page: number) => void;
-  sectionRef: React.RefObject<HTMLElement | null>;
-  label: string; // e.g., "Popular Audiobooks"
-  footerRef?: React.RefObject<HTMLElement | null>; // Optional footer ref to avoid overlap
-}
-
-export function StickyPagination({
-  currentPage,
-  totalPages,
-  onPageChange,
-  sectionRef,
-  label,
-  footerRef,
-}: StickyPaginationProps) {
-  const [isVisible, setIsVisible] = useState(false);
-  const [isFooterVisible, setIsFooterVisible] = useState(false);
-  const [jumpPage, setJumpPage] = useState(currentPage.toString());
-
-  // Update jump page input when current page changes externally
-  useEffect(() => {
-    setJumpPage(currentPage.toString());
-  }, [currentPage]);
-
-  // Intersection Observer to show/hide pagination based on section visibility
-  useEffect(() => {
-    if (!sectionRef.current) return;
-
-    const observer = new IntersectionObserver(
-      ([entry]) => {
-        // Show pagination when section is in viewport
-        setIsVisible(entry.isIntersecting && entry.intersectionRatio > 0.1);
-      },
-      {
-        threshold: [0, 0.1, 0.5, 1],
-        rootMargin: '-60px 0px -60px 0px', // Account for header/footer
-      }
-    );
-
-    observer.observe(sectionRef.current);
-
-    return () => observer.disconnect();
-  }, [sectionRef]);
-
-  // Footer observer to hide pagination when footer is visible
-  useEffect(() => {
-    if (!footerRef?.current) return;
-
-    const observer = new IntersectionObserver(
-      ([entry]) => {
-        // Hide pagination when footer is in viewport
-        setIsFooterVisible(entry.isIntersecting);
-      },
-      {
-        threshold: [0, 0.1],
-        rootMargin: '0px',
-      }
-    );
-
-    observer.observe(footerRef.current);
-
-    return () => observer.disconnect();
-  }, [footerRef]);
-
-  if (totalPages <= 1) {
-    return null;
-  }
-
-  const handlePrevious = () => {
-    if (currentPage > 1) {
-      onPageChange(currentPage - 1);
-    }
-  };
-
-  const handleNext = () => {
-    if (currentPage < totalPages) {
-      onPageChange(currentPage + 1);
-    }
-  };
-
-  const handleJumpSubmit = (e: React.FormEvent) => {
-    e.preventDefault();
-    const page = parseInt(jumpPage, 10);
-    if (!isNaN(page) && page >= 1 && page <= totalPages) {
-      onPageChange(page);
-    } else {
-      // Reset to current page if invalid
-      setJumpPage(currentPage.toString());
-    }
-  };
-
-  // Final visibility: show when section is visible AND footer is not visible
-  const shouldShow = isVisible && !isFooterVisible;
-
-  return (
-    <div
-      className={`fixed bottom-6 left-1/2 -translate-x-1/2 z-40 transition-all duration-300 ${
-        shouldShow ? 'translate-y-0 opacity-100' : 'translate-y-20 opacity-0'
-      }`}
-    >
-      <div className="bg-white/95 dark:bg-gray-900/95 backdrop-blur-lg rounded-full shadow-lg border border-gray-200 dark:border-gray-700 px-4 py-2.5">
-        <div className="flex items-center gap-3">
-          {/* Section Label - Hidden on small screens */}
-          <div className="hidden md:block text-xs font-medium text-gray-600 dark:text-gray-400 pr-2 border-r border-gray-300 dark:border-gray-600">
-            {label}
-          </div>
-
-          {/* Previous Button */}
-          <button
-            onClick={handlePrevious}
-            disabled={currentPage === 1}
-            className="p-1.5 rounded-full hover:bg-gray-100 dark:hover:bg-gray-800
-                     text-gray-700 dark:text-gray-300 disabled:opacity-30 disabled:cursor-not-allowed
-                     transition-colors"
-            aria-label="Previous page"
-          >
-            <ChevronLeftIcon className="w-4 h-4" />
-          </button>
-
-          {/* Page Info & Jump */}
-          <div className="flex items-center gap-1.5">
-            <span className="text-sm text-gray-600 dark:text-gray-400 whitespace-nowrap">
-              Page
-            </span>
-            <form onSubmit={handleJumpSubmit} className="inline-flex">
-              <input
-                type="text"
-                value={jumpPage}
-                onChange={(e) => setJumpPage(e.target.value)}
-                onBlur={handleJumpSubmit}
-                className="w-10 px-1.5 py-0.5 text-center text-sm font-medium rounded
-                         bg-gray-100 dark:bg-gray-800 text-gray-900 dark:text-gray-100
-                         border border-gray-300 dark:border-gray-600
-                         focus:outline-none focus:ring-1 focus:ring-blue-500 focus:border-transparent"
-                aria-label="Current page"
-              />
-            </form>
-            <span className="text-sm text-gray-600 dark:text-gray-400 whitespace-nowrap">
-              of {totalPages}
-            </span>
-          </div>
-
-          {/* Next Button */}
-          <button
-            onClick={handleNext}
-            disabled={currentPage === totalPages}
-            className="p-1.5 rounded-full hover:bg-gray-100 dark:hover:bg-gray-800
-                     text-gray-700 dark:text-gray-300 disabled:opacity-30 disabled:cursor-not-allowed
-                     transition-colors"
-            aria-label="Next page"
-          >
-            <ChevronRightIcon className="w-4 h-4" />
-          </button>
-        </div>
-      </div>
-    </div>
-  );
-}

src/components/ui/UnifiedPagination.tsx

@@ -0,0 +1,325 @@
+/**
+ * Component: Unified Pagination — context-aware floating paginator
+ * Documentation: documentation/frontend/components.md
+ *
+ * Replaces two overlapping StickyPagination instances with a single pill
+ * that automatically tracks which section dominates the viewport and shows
+ * controls for that section. Transitions smoothly when the dominant section
+ * changes. Includes a two-dot section indicator for manual switching.
+ */
+
+'use client';
+
+import React, { useState, useEffect, useRef, useCallback } from 'react';
+import { ChevronLeftIcon, ChevronRightIcon } from '@heroicons/react/24/outline';
+
+export interface PaginationSection {
+  /** Display label, e.g. "Popular Audiobooks" */
+  label: string;
+  /** Tailwind color class applied to the active accent dot, e.g. "bg-blue-500" */
+  accentColor: string;
+  currentPage: number;
+  totalPages: number;
+  onPageChange: (page: number) => void;
+  /** Ref to the section element — used for intersection tracking */
+  sectionRef: React.RefObject<HTMLElement | null>;
+  /** Called when user clicks this section's dot while it's inactive — should scroll to section */
+  onScrollToSection: () => void;
+}
+
+interface UnifiedPaginationProps {
+  sections: [PaginationSection, PaginationSection];
+  footerRef?: React.RefObject<HTMLElement | null>;
+}
+
+// ---------------------------------------------------------------------------
+// Small page-jump form — isolated to prevent key re-mounts on section switch
+// ---------------------------------------------------------------------------
+
+interface PageJumpProps {
+  currentPage: number;
+  totalPages: number;
+  onPageChange: (page: number) => void;
+}
+
+function PageJump({ currentPage, totalPages, onPageChange }: PageJumpProps) {
+  const [value, setValue] = useState(currentPage.toString());
+
+  // Sync when page changes externally (e.g. after scrollIntoView + setState)
+  useEffect(() => {
+    setValue(currentPage.toString());
+  }, [currentPage]);
+
+  const commit = useCallback(
+    (e?: React.FormEvent) => {
+      e?.preventDefault();
+      const parsed = parseInt(value, 10);
+      if (!isNaN(parsed) && parsed >= 1 && parsed <= totalPages) {
+        onPageChange(parsed);
+      } else {
+        setValue(currentPage.toString());
+      }
+    },
+    [value, currentPage, totalPages, onPageChange]
+  );
+
+  return (
+    <div className="flex items-center gap-1.5">
+      <span className="text-sm text-gray-500 dark:text-gray-400 select-none whitespace-nowrap">
+        Page
+      </span>
+      <form onSubmit={commit} className="inline-flex">
+        <input
+          type="text"
+          inputMode="numeric"
+          value={value}
+          onChange={(e) => setValue(e.target.value)}
+          onBlur={commit}
+          className="w-10 px-1.5 py-0.5 text-center text-sm font-medium rounded-md
+                     bg-black/[0.04] dark:bg-white/[0.08]
+                     text-gray-900 dark:text-gray-100
+                     border border-gray-300/60 dark:border-white/10
+                     focus:outline-none focus:ring-2 focus:ring-blue-500/50 focus:border-transparent
+                     transition-all duration-150"
+          aria-label="Jump to page"
+        />
+      </form>
+      <span className="text-sm text-gray-500 dark:text-gray-400 select-none whitespace-nowrap">
+        of {totalPages}
+      </span>
+    </div>
+  );
+}
+
+// ---------------------------------------------------------------------------
+// Main component
+// ---------------------------------------------------------------------------
+
+export function UnifiedPagination({ sections, footerRef }: UnifiedPaginationProps) {
+  // Index of the currently dominant section (0 or 1)
+  const [activeIndex, setActiveIndex] = useState<0 | 1>(0);
+  // Whether the label+controls area is mid-transition (drives opacity fade)
+  const [isTransitioning, setIsTransitioning] = useState(false);
+
+  const [footerVisible, setFooterVisible] = useState(false);
+  // Per-section raw intersection ratios [0,1]
+  const ratiosRef = useRef<[number, number]>([0, 0]);
+  // Whether each section has any meaningful intersection
+  const [sectionVisible, setSectionVisible] = useState<[boolean, boolean]>([false, false]);
+
+  const transitionTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  // Determine if the pill should be shown at all:
+  // - at least one section is meaningfully visible
+  // - footer is not visible
+  // - the active section has >1 page
+  const activeSectionHasPages = sections[activeIndex].totalPages > 1;
+  const eitherSectionVisible = sectionVisible[0] || sectionVisible[1];
+  const shouldShow = eitherSectionVisible && !footerVisible && activeSectionHasPages;
+
+  // ------------------------------------------------------------------
+  // Track which section each instance belongs to via intersection ratio
+  // ------------------------------------------------------------------
+  useEffect(() => {
+    const observers: IntersectionObserver[] = [];
+
+    sections.forEach((section, idx) => {
+      if (!section.sectionRef.current) return;
+
+      const observer = new IntersectionObserver(
+        ([entry]) => {
+          ratiosRef.current[idx as 0 | 1] = entry.intersectionRatio;
+          const isVisible = entry.isIntersecting && entry.intersectionRatio > 0.05;
+
+          setSectionVisible((prev) => {
+            const next: [boolean, boolean] = [...prev] as [boolean, boolean];
+            next[idx as 0 | 1] = isVisible;
+            return next;
+          });
+
+          // Determine dominant section (whichever has more viewport coverage)
+          const [r0, r1] = ratiosRef.current;
+          const dominant: 0 | 1 = r0 >= r1 ? 0 : 1;
+
+          setActiveIndex((current) => {
+            if (current !== dominant) {
+              // Trigger cross-fade transition
+              setIsTransitioning(true);
+
+              if (transitionTimerRef.current) {
+                clearTimeout(transitionTimerRef.current);
+              }
+              transitionTimerRef.current = setTimeout(() => {
+                setIsTransitioning(false);
+              }, 320);
+
+              return dominant;
+            }
+            return current;
+          });
+        },
+        {
+          // Dense threshold array gives us smooth ratio tracking
+          threshold: Array.from({ length: 21 }, (_, i) => i / 20),
+          rootMargin: '-60px 0px -80px 0px',
+        }
+      );
+
+      observer.observe(section.sectionRef.current);
+      observers.push(observer);
+    });
+
+    return () => {
+      observers.forEach((o) => o.disconnect());
+      if (transitionTimerRef.current) clearTimeout(transitionTimerRef.current);
+    };
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [sections[0].sectionRef, sections[1].sectionRef]);
+
+  // ------------------------------------------------------------------
+  // Footer observer
+  // ------------------------------------------------------------------
+  useEffect(() => {
+    if (!footerRef?.current) return;
+    const observer = new IntersectionObserver(
+      ([entry]) => setFooterVisible(entry.isIntersecting),
+      { threshold: [0, 0.01] }
+    );
+    observer.observe(footerRef.current);
+    return () => observer.disconnect();
+  }, [footerRef]);
+
+  // ------------------------------------------------------------------
+  // Derived values for the currently active section
+  // ------------------------------------------------------------------
+  const active = sections[activeIndex];
+
+  const handlePrev = () => {
+    if (active.currentPage > 1) active.onPageChange(active.currentPage - 1);
+  };
+  const handleNext = () => {
+    if (active.currentPage < active.totalPages) active.onPageChange(active.currentPage + 1);
+  };
+
+  // ------------------------------------------------------------------
+  // Render
+  // ------------------------------------------------------------------
+  return (
+    <div
+      className={`
+        fixed bottom-6 left-1/2 -translate-x-1/2 z-40
+        transition-all duration-300 ease-out
+        ${shouldShow
+          ? 'translate-y-0 opacity-100 pointer-events-auto'
+          : 'translate-y-4 opacity-0 pointer-events-none'
+        }
+      `}
+      aria-hidden={!shouldShow}
+    >
+      {/* Pill surface */}
+      <div
+        className="
+          flex items-center gap-0
+          bg-white/90 dark:bg-gray-900/90
+          backdrop-blur-xl
+          rounded-full
+          shadow-[0_8px_32px_rgba(0,0,0,0.12),0_2px_8px_rgba(0,0,0,0.08)]
+          dark:shadow-[0_8px_32px_rgba(0,0,0,0.4),0_2px_8px_rgba(0,0,0,0.3)]
+          border border-gray-200/60 dark:border-white/[0.08]
+          px-1.5 py-1.5
+          overflow-hidden
+        "
+      >
+        {/* Section selector dots — left side */}
+        <div className="flex flex-col gap-1 pl-2 pr-3">
+          {sections.map((section, idx) => {
+            const isActive = idx === activeIndex;
+            return (
+              <button
+                key={section.label}
+                onClick={() => {
+                  if (!isActive) section.onScrollToSection();
+                }}
+                disabled={isActive}
+                title={section.label}
+                aria-label={`Switch to ${section.label}`}
+                className={`
+                  w-1.5 rounded-full transition-all duration-300 ease-out
+                  ${isActive
+                    ? `${section.accentColor} h-4 opacity-100`
+                    : 'bg-gray-300 dark:bg-gray-600 h-1.5 opacity-60 hover:opacity-90 hover:scale-110 cursor-pointer'
+                  }
+                `}
+              />
+            );
+          })}
+        </div>
+
+        {/* Divider */}
+        <div className="w-px h-6 bg-gray-200 dark:bg-white/10 mr-3 flex-shrink-0" />
+
+        {/* Label + controls — cross-fades on section switch */}
+        <div
+          className={`
+            flex items-center gap-3
+            transition-opacity duration-200 ease-in-out
+            ${isTransitioning ? 'opacity-0' : 'opacity-100'}
+          `}
+          // key forces full remount on switch so input state resets cleanly
+          key={activeIndex}
+        >
+          {/* Section label — hidden on small screens */}
+          <span className="hidden sm:block text-xs font-medium text-gray-500 dark:text-gray-400 whitespace-nowrap pr-1 select-none">
+            {active.label}
+          </span>
+
+          {/* Previous */}
+          <button
+            onClick={handlePrev}
+            disabled={active.currentPage === 1}
+            aria-label="Previous page"
+            className="
+              p-1.5 rounded-full
+              text-gray-600 dark:text-gray-300
+              hover:bg-black/[0.06] dark:hover:bg-white/[0.08]
+              active:bg-black/[0.1] dark:active:bg-white/[0.12]
+              active:scale-95
+              disabled:opacity-25 disabled:cursor-not-allowed
+              transition-all duration-150
+            "
+          >
+            <ChevronLeftIcon className="w-4 h-4" strokeWidth={2} />
+          </button>
+
+          {/* Page jump */}
+          <PageJump
+            currentPage={active.currentPage}
+            totalPages={active.totalPages}
+            onPageChange={active.onPageChange}
+          />
+
+          {/* Next */}
+          <button
+            onClick={handleNext}
+            disabled={active.currentPage === active.totalPages}
+            aria-label="Next page"
+            className="
+              p-1.5 rounded-full
+              text-gray-600 dark:text-gray-300
+              hover:bg-black/[0.06] dark:hover:bg-white/[0.08]
+              active:bg-black/[0.1] dark:active:bg-white/[0.12]
+              active:scale-95
+              disabled:opacity-25 disabled:cursor-not-allowed
+              transition-all duration-150
+            "
+          >
+            <ChevronRightIcon className="w-4 h-4" strokeWidth={2} />
+          </button>
+        </div>
+
+        {/* Right padding balance */}
+        <div className="w-2" />
+      </div>
+    </div>
+  );
+}

src/components/ui/WatchButton.tsx

@@ -0,0 +1,186 @@
+/**
+ * Component: Watch Button (Series / Author)
+ * Documentation: documentation/features/watched-lists.md
+ *
+ * Reusable toggle button for watching/unwatching a series or author.
+ * Shows a confirmation modal before watching. Unwatching is instant.
+ */
+
+'use client';
+
+import React, { useState } from 'react';
+import { useWatchedSeries, useAddWatchedSeries, useDeleteWatchedSeries } from '@/lib/hooks/useWatchedSeries';
+import { useWatchedAuthors, useAddWatchedAuthor, useDeleteWatchedAuthor } from '@/lib/hooks/useWatchedAuthors';
+import { ConfirmModal } from './ConfirmModal';
+
+interface WatchSeriesButtonProps {
+  seriesAsin: string;
+  seriesTitle: string;
+  coverArtUrl?: string;
+}
+
+export function WatchSeriesButton({ seriesAsin, seriesTitle, coverArtUrl }: WatchSeriesButtonProps) {
+  const { series } = useWatchedSeries();
+  const { addSeries, isLoading: isAdding } = useAddWatchedSeries();
+  const { deleteSeries, isLoading: isDeleting } = useDeleteWatchedSeries();
+  const [error, setError] = useState<string | null>(null);
+  const [showConfirm, setShowConfirm] = useState(false);
+
+  const watchedEntry = series.find((s) => s.seriesAsin === seriesAsin);
+  const isWatching = !!watchedEntry;
+  const isLoading = isAdding || isDeleting;
+
+  const handleClick = async () => {
+    setError(null);
+    if (isWatching && watchedEntry) {
+      // Unwatch immediately (no confirmation needed)
+      try {
+        await deleteSeries(watchedEntry.id);
+      } catch (err) {
+        setError(err instanceof Error ? err.message : 'Failed');
+      }
+    } else {
+      // Show confirmation before watching
+      setShowConfirm(true);
+    }
+  };
+
+  const handleConfirmWatch = async () => {
+    setShowConfirm(false);
+    setError(null);
+    try {
+      await addSeries(seriesAsin, seriesTitle, coverArtUrl);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed');
+    }
+  };
+
+  return (
+    <div className="inline-flex flex-col items-start">
+      <button
+        onClick={handleClick}
+        disabled={isLoading}
+        className={`inline-flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg transition-all duration-200 ${
+          isWatching
+            ? 'bg-emerald-50 dark:bg-emerald-900/30 text-emerald-700 dark:text-emerald-300 hover:bg-emerald-100 dark:hover:bg-emerald-900/50 border border-emerald-200 dark:border-emerald-700/50'
+            : 'bg-gray-100 dark:bg-gray-700/50 text-gray-700 dark:text-gray-300 hover:bg-emerald-50 dark:hover:bg-emerald-900/20 hover:text-emerald-700 dark:hover:text-emerald-300 border border-gray-200 dark:border-gray-600/50 hover:border-emerald-200 dark:hover:border-emerald-700/50'
+        } ${isLoading ? 'opacity-60 cursor-not-allowed' : ''}`}
+      >
+        {isLoading ? (
+          <svg className="w-4 h-4 animate-spin" fill="none" viewBox="0 0 24 24">
+            <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+            <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z" />
+          </svg>
+        ) : isWatching ? (
+          <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 24 24">
+            <path d="M12 4.5C7 4.5 2.73 7.61 1 12c1.73 4.39 6 7.5 11 7.5s9.27-3.11 11-7.5c-1.73-4.39-6-7.5-11-7.5zM12 17c-2.76 0-5-2.24-5-5s2.24-5 5-5 5 2.24 5 5-2.24 5-5 5zm0-8c-1.66 0-3 1.34-3 3s1.34 3 3 3 3-1.34 3-3-1.34-3-3-3z" />
+          </svg>
+        ) : (
+          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
+          </svg>
+        )}
+        {isWatching ? 'Watching' : 'Watch Series'}
+      </button>
+      {error && (
+        <span className="text-xs text-red-500 mt-1">{error}</span>
+      )}
+      <ConfirmModal
+        isOpen={showConfirm}
+        onClose={() => setShowConfirm(false)}
+        onConfirm={handleConfirmWatch}
+        title={`Watch "${seriesTitle}"?`}
+        message={`This will request all books in "${seriesTitle}" that aren't already in your library, and automatically request new releases as they're added to the series. Continue?`}
+        confirmText="Watch"
+        isLoading={isAdding}
+      />
+    </div>
+  );
+}
+
+interface WatchAuthorButtonProps {
+  authorAsin: string;
+  authorName: string;
+  coverArtUrl?: string;
+}
+
+export function WatchAuthorButton({ authorAsin, authorName, coverArtUrl }: WatchAuthorButtonProps) {
+  const { authors } = useWatchedAuthors();
+  const { addAuthor, isLoading: isAdding } = useAddWatchedAuthor();
+  const { deleteAuthor, isLoading: isDeleting } = useDeleteWatchedAuthor();
+  const [error, setError] = useState<string | null>(null);
+  const [showConfirm, setShowConfirm] = useState(false);
+
+  const watchedEntry = authors.find((a) => a.authorAsin === authorAsin);
+  const isWatching = !!watchedEntry;
+  const isLoading = isAdding || isDeleting;
+
+  const handleClick = async () => {
+    setError(null);
+    if (isWatching && watchedEntry) {
+      // Unwatch immediately (no confirmation needed)
+      try {
+        await deleteAuthor(watchedEntry.id);
+      } catch (err) {
+        setError(err instanceof Error ? err.message : 'Failed');
+      }
+    } else {
+      // Show confirmation before watching
+      setShowConfirm(true);
+    }
+  };
+
+  const handleConfirmWatch = async () => {
+    setShowConfirm(false);
+    setError(null);
+    try {
+      await addAuthor(authorAsin, authorName, coverArtUrl);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed');
+    }
+  };
+
+  return (
+    <div className="inline-flex flex-col items-start">
+      <button
+        onClick={handleClick}
+        disabled={isLoading}
+        className={`inline-flex items-center gap-2 px-4 py-2 text-sm font-medium rounded-lg transition-all duration-200 ${
+          isWatching
+            ? 'bg-blue-50 dark:bg-blue-900/30 text-blue-700 dark:text-blue-300 hover:bg-blue-100 dark:hover:bg-blue-900/50 border border-blue-200 dark:border-blue-700/50'
+            : 'bg-gray-100 dark:bg-gray-700/50 text-gray-700 dark:text-gray-300 hover:bg-blue-50 dark:hover:bg-blue-900/20 hover:text-blue-700 dark:hover:text-blue-300 border border-gray-200 dark:border-gray-600/50 hover:border-blue-200 dark:hover:border-blue-700/50'
+        } ${isLoading ? 'opacity-60 cursor-not-allowed' : ''}`}
+      >
+        {isLoading ? (
+          <svg className="w-4 h-4 animate-spin" fill="none" viewBox="0 0 24 24">
+            <circle className="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" strokeWidth="4" />
+            <path className="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z" />
+          </svg>
+        ) : isWatching ? (
+          <svg className="w-4 h-4" fill="currentColor" viewBox="0 0 24 24">
+            <path d="M12 4.5C7 4.5 2.73 7.61 1 12c1.73 4.39 6 7.5 11 7.5s9.27-3.11 11-7.5c-1.73-4.39-6-7.5-11-7.5zM12 17c-2.76 0-5-2.24-5-5s2.24-5 5-5 5 2.24 5 5-2.24 5-5 5zm0-8c-1.66 0-3 1.34-3 3s1.34 3 3 3 3-1.34 3-3-1.34-3-3-3z" />
+          </svg>
+        ) : (
+          <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+            <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M2.458 12C3.732 7.943 7.523 5 12 5c4.478 0 8.268 2.943 9.542 7-1.274 4.057-5.064 7-9.542 7-4.477 0-8.268-2.943-9.542-7z" />
+          </svg>
+        )}
+        {isWatching ? 'Watching' : 'Watch Author'}
+      </button>
+      {error && (
+        <span className="text-xs text-red-500 mt-1">{error}</span>
+      )}
+      <ConfirmModal
+        isOpen={showConfirm}
+        onClose={() => setShowConfirm(false)}
+        onConfirm={handleConfirmWatch}
+        title={`Watch "${authorName}"?`}
+        message={`This will request all books by "${authorName}" that aren't already in your library, and automatically request new releases. Continue?`}
+        confirmText="Watch"
+        isLoading={isAdding}
+      />
+    </div>
+  );
+}

src/lib/hooks/useAudiobooks.ts

@@ -35,11 +35,12 @@ export interface Audiobook {
   hasReportedIssue?: boolean;  // True if an open issue exists for this audiobook
 }
 
-export function useAudiobooks(type: 'popular' | 'new-releases', limit: number = 20, page: number = 1) {
+export function useAudiobooks(type: 'popular' | 'new-releases', limit: number = 20, page: number = 1, hideAvailable: boolean = false) {
+  const hideParam = hideAvailable ? '&hideAvailable=true' : '';
   const endpoint =
     type === 'popular'
-      ? `/api/audiobooks/popular?page=${page}&limit=${limit}`
+      ? `/api/audiobooks/popular?page=${page}&limit=${limit}${hideParam}`
-      : `/api/audiobooks/new-releases?page=${page}&limit=${limit}`;
+      : `/api/audiobooks/new-releases?page=${page}&limit=${limit}${hideParam}`;
 
   const { data, error, isLoading } = useSWR(endpoint, authenticatedFetcher, {
     revalidateOnFocus: false,

src/lib/hooks/useWatchedAuthors.ts

@@ -0,0 +1,119 @@
+/**
+ * Component: Watched Authors Hook
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+'use client';
+
+import { useState } from 'react';
+import useSWR, { mutate } from 'swr';
+import { useAuth } from '@/contexts/AuthContext';
+import { fetchWithAuth } from '@/lib/utils/api';
+
+export interface WatchedAuthorItem {
+  id: string;
+  authorAsin: string;
+  authorName: string;
+  coverArtUrl: string | null;
+  lastCheckedAt: string | null;
+  createdAt: string;
+}
+
+const fetcher = (url: string) =>
+  fetchWithAuth(url).then((res) => res.json());
+
+export function useWatchedAuthors() {
+  const { accessToken } = useAuth();
+
+  const endpoint = accessToken ? '/api/user/watched-authors' : null;
+
+  const { data, error, isLoading } = useSWR(
+    endpoint,
+    fetcher,
+    { refreshInterval: 60000 }
+  );
+
+  return {
+    authors: (data?.authors || []) as WatchedAuthorItem[],
+    isLoading,
+    error,
+  };
+}
+
+export function useAddWatchedAuthor() {
+  const { accessToken } = useAuth();
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const addAuthor = async (authorAsin: string, authorName: string, coverArtUrl?: string) => {
+    if (!accessToken) throw new Error('Not authenticated');
+
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const response = await fetchWithAuth('/api/user/watched-authors', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ authorAsin, authorName, coverArtUrl }),
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.message || data.error || 'Failed to watch author');
+      }
+
+      // Revalidate watched authors list
+      mutate((key) => typeof key === 'string' && key.includes('/api/user/watched-authors'));
+
+      return data.author as WatchedAuthorItem;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Unknown error';
+      setError(message);
+      throw err;
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return { addAuthor, isLoading, error };
+}
+
+export function useDeleteWatchedAuthor() {
+  const { accessToken } = useAuth();
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const deleteAuthor = async (id: string) => {
+    if (!accessToken) throw new Error('Not authenticated');
+
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const response = await fetchWithAuth(`/api/user/watched-authors/${id}`, {
+        method: 'DELETE',
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.message || data.error || 'Failed to unwatch author');
+      }
+
+      // Revalidate watched authors list
+      mutate((key) => typeof key === 'string' && key.includes('/api/user/watched-authors'));
+
+      return true;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Unknown error';
+      setError(message);
+      throw err;
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return { deleteAuthor, isLoading, error };
+}

src/lib/hooks/useWatchedSeries.ts

@@ -0,0 +1,119 @@
+/**
+ * Component: Watched Series Hook
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+'use client';
+
+import { useState } from 'react';
+import useSWR, { mutate } from 'swr';
+import { useAuth } from '@/contexts/AuthContext';
+import { fetchWithAuth } from '@/lib/utils/api';
+
+export interface WatchedSeriesItem {
+  id: string;
+  seriesAsin: string;
+  seriesTitle: string;
+  coverArtUrl: string | null;
+  lastCheckedAt: string | null;
+  createdAt: string;
+}
+
+const fetcher = (url: string) =>
+  fetchWithAuth(url).then((res) => res.json());
+
+export function useWatchedSeries() {
+  const { accessToken } = useAuth();
+
+  const endpoint = accessToken ? '/api/user/watched-series' : null;
+
+  const { data, error, isLoading } = useSWR(
+    endpoint,
+    fetcher,
+    { refreshInterval: 60000 }
+  );
+
+  return {
+    series: (data?.series || []) as WatchedSeriesItem[],
+    isLoading,
+    error,
+  };
+}
+
+export function useAddWatchedSeries() {
+  const { accessToken } = useAuth();
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const addSeries = async (seriesAsin: string, seriesTitle: string, coverArtUrl?: string) => {
+    if (!accessToken) throw new Error('Not authenticated');
+
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const response = await fetchWithAuth('/api/user/watched-series', {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ seriesAsin, seriesTitle, coverArtUrl }),
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.message || data.error || 'Failed to watch series');
+      }
+
+      // Revalidate watched series list
+      mutate((key) => typeof key === 'string' && key.includes('/api/user/watched-series'));
+
+      return data.series as WatchedSeriesItem;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Unknown error';
+      setError(message);
+      throw err;
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return { addSeries, isLoading, error };
+}
+
+export function useDeleteWatchedSeries() {
+  const { accessToken } = useAuth();
+  const [isLoading, setIsLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const deleteSeries = async (id: string) => {
+    if (!accessToken) throw new Error('Not authenticated');
+
+    setIsLoading(true);
+    setError(null);
+
+    try {
+      const response = await fetchWithAuth(`/api/user/watched-series/${id}`, {
+        method: 'DELETE',
+      });
+
+      const data = await response.json();
+
+      if (!response.ok) {
+        throw new Error(data.message || data.error || 'Failed to unwatch series');
+      }
+
+      // Revalidate watched series list
+      mutate((key) => typeof key === 'string' && key.includes('/api/user/watched-series'));
+
+      return true;
+    } catch (err) {
+      const message = err instanceof Error ? err.message : 'Unknown error';
+      setError(message);
+      throw err;
+    } finally {
+      setIsLoading(false);
+    }
+  };
+
+  return { deleteSeries, isLoading, error };
+}

src/lib/integrations/audible-series.ts

@@ -14,8 +14,10 @@ import {
   getLanguageForRegion,
   buildContainsSelector,
   stripPrefixes,
+  type LanguageConfig,
 } from '../constants/language-config';
 import { RMABLogger } from '../utils/logger';
+import { parseRuntime } from '../utils/parse-runtime';
 import { randomDelay } from '../utils/scrape-resilience';
 
 const logger = RMABLogger.create('Audible.Series');
@@ -311,7 +313,7 @@ export async function scrapeSeriesPage(asin: string, page: number = 1): Promise<
       undefined;
 
     // Parse all books from the series page
-    const books = parseSeriesBooks($, langConfig.scraping.authorPrefixes, langConfig.scraping.narratorPrefixes);
+    const books = parseSeriesBooks($, langConfig.scraping.authorPrefixes, langConfig.scraping.narratorPrefixes, langConfig);
 
     // Use actual book count if we got more from scraping
     const bookCount = Math.max(summary.bookCount, books.length);
@@ -403,7 +405,8 @@ function parseSeriesRating($: cheerio.CheerioAPI): { rating?: number; ratingCoun
 function parseSeriesBooks(
   $: cheerio.CheerioAPI,
   authorPrefixes: string[],
-  narratorPrefixes: string[]
+  narratorPrefixes: string[],
+  langConfig: LanguageConfig
 ): AudibleAudiobook[] {
   const books: AudibleAudiobook[] = [];
   const seenAsins = new Set<string>();
@@ -453,6 +456,11 @@ function parseSeriesBooks(
     const ratingMatch = ratingText ? ratingText.match(/(\d+[.,]?\d*)/) : null;
     const rating = ratingMatch ? parseFloat(ratingMatch[1].replace(',', '.')) : undefined;
 
+    // Duration
+    const runtimeText = $el.find('.runtimeLabel').text().trim() ||
+      $el.find(buildContainsSelector('span', langConfig.scraping.lengthLabels)).text().trim();
+    const durationMinutes = parseRuntime(runtimeText, langConfig);
+
     books.push({
       asin: bookAsin,
       title,
@@ -461,6 +469,7 @@ function parseSeriesBooks(
       narrator: stripPrefixes(narratorText, narratorPrefixes),
       coverArtUrl,
       rating,
+      durationMinutes,
     });
   });
 

src/lib/integrations/audible.service.ts

@@ -23,6 +23,7 @@ import {
   AdaptivePacer,
   FetchResultMeta,
 } from '../utils/scrape-resilience';
+import { parseRuntime as parseRuntimeUtil } from '../utils/parse-runtime';
 
 // Module-level logger
 const logger = RMABLogger.create('Audible');
@@ -1134,33 +1135,11 @@ export class AudibleService {
   }
 
   /**
-   * Parse runtime text to minutes using language-specific patterns
+   * Parse runtime text to minutes using language-specific patterns.
+   * Delegates to shared utility in src/lib/utils/parse-runtime.ts.
    */
   private parseRuntime(runtimeText: string): number | undefined {
-    if (!runtimeText) return undefined;
+    return parseRuntimeUtil(runtimeText, this.getLangConfig());
-
-    const langConfig = this.getLangConfig();
-    let totalMinutes = 0;
-
-    // Try each hour pattern until one matches
-    for (const pattern of langConfig.scraping.runtimeHourPatterns) {
-      const match = runtimeText.match(pattern);
-      if (match) {
-        totalMinutes += parseInt(match[1]) * 60;
-        break;
-      }
-    }
-
-    // Try each minute pattern until one matches
-    for (const pattern of langConfig.scraping.runtimeMinutePatterns) {
-      const match = runtimeText.match(pattern);
-      if (match) {
-        totalMinutes += parseInt(match[1]);
-        break;
-      }
-    }
-
-    return totalMinutes > 0 ? totalMinutes : undefined;
   }
 
   /**

src/lib/processors/check-watched-lists.processor.ts

@@ -0,0 +1,43 @@
+/**
+ * Component: Check Watched Lists Processor
+ * Documentation: documentation/features/watched-lists.md
+ *
+ * Dedicated processor for checking watched series and watched authors
+ * for new releases and auto-creating requests.
+ * Supports targeted processing of a single series/author for immediate sync.
+ */
+
+import { RMABLogger } from '../utils/logger';
+
+export interface CheckWatchedListsPayload {
+  jobId?: string;
+  scheduledJobId?: string;
+  /** If set, only process watched items for this user */
+  userId?: string;
+  /** If set, only process this specific series */
+  seriesAsin?: string;
+  /** If set, only process this specific author */
+  authorAsin?: string;
+}
+
+export async function processCheckWatchedLists(payload: CheckWatchedListsPayload): Promise<any> {
+  const { jobId, userId, seriesAsin, authorAsin } = payload;
+  const logger = RMABLogger.forJob(jobId, 'CheckWatchedLists');
+
+  const isTargeted = !!(userId && (seriesAsin || authorAsin));
+  logger.info(isTargeted
+    ? `Starting targeted watched lists check (user: ${userId}, series: ${seriesAsin || 'n/a'}, author: ${authorAsin || 'n/a'})...`
+    : 'Starting watched lists check...'
+  );
+
+  const { processWatchedLists } = await import('../services/watched-lists.service');
+  const stats = await processWatchedLists(logger, { userId, seriesAsin, authorAsin });
+
+  logger.info('Watched lists check complete', { stats });
+
+  return {
+    success: true,
+    message: isTargeted ? 'Targeted watched item checked' : 'Watched lists checked',
+    ...stats,
+  };
+}

src/lib/services/job-queue.service.ts

@@ -27,6 +27,7 @@ export type JobType =
   | 'cleanup_seeded_torrents'
   | 'monitor_rss_feeds'
   | 'sync_reading_shelves'
+  | 'check_watched_lists'
   | 'send_notification'
   // Ebook-specific job types
   | 'search_ebook'
@@ -114,6 +115,16 @@ export interface SyncShelvesPayload extends JobPayload {
   maxLookupsPerShelf?: number;
 }
 
+export interface CheckWatchedListsPayload extends JobPayload {
+  scheduledJobId?: string;
+  /** If set, only process watched items for this user */
+  userId?: string;
+  /** If set, only process this specific series */
+  seriesAsin?: string;
+  /** If set, only process this specific author */
+  authorAsin?: string;
+}
+
 // Ebook-specific payload interfaces
 export interface SearchEbookPayload extends JobPayload {
   requestId: string;
@@ -385,6 +396,12 @@ export class JobQueueService {
       return await processSyncShelves(payloadWithJobId);
     });
 
+    this.queue.process('check_watched_lists', 1, async (job: BullJob<CheckWatchedListsPayload>) => {
+      const { processCheckWatchedLists } = await import('../processors/check-watched-lists.processor');
+      const payloadWithJobId = await this.ensureJobRecord(job, 'check_watched_lists');
+      return await processCheckWatchedLists(payloadWithJobId);
+    });
+
     // Send notification processor
     this.queue.process('send_notification', 2, async (job: BullJob<SendNotificationPayload>) => {
       const { processSendNotification } = await import('../processors/send-notification.processor');
@@ -768,6 +785,39 @@ export class JobQueueService {
     );
   }
 
+  /**
+   * Add check watched lists job (watched series + watched authors)
+   */
+  async addCheckWatchedListsJob(scheduledJobId?: string): Promise<string> {
+    return await this.addJob(
+      'check_watched_lists',
+      {
+        scheduledJobId,
+      } as CheckWatchedListsPayload,
+      {
+        priority: 7,
+      }
+    );
+  }
+
+  /**
+   * Add a targeted check for a specific watched series or author for a specific user.
+   * Used for immediate processing when a user adds a new watch.
+   */
+  async addCheckWatchedItemJob(userId: string, seriesAsin?: string, authorAsin?: string): Promise<string> {
+    return await this.addJob(
+      'check_watched_lists',
+      {
+        userId,
+        seriesAsin,
+        authorAsin,
+      } as CheckWatchedListsPayload,
+      {
+        priority: 8, // Higher than scheduled (7) since user-initiated
+      }
+    );
+  }
+
   // =========================================================================
   // EBOOK-SPECIFIC JOB METHODS
   // =========================================================================

src/lib/services/request-creator.service.ts

@@ -12,6 +12,7 @@ import { getJobQueueService } from '@/lib/services/job-queue.service';
 import { findPlexMatch } from '@/lib/utils/audiobook-matcher';
 import { getAudibleService } from '@/lib/integrations/audible.service';
 import { RMABLogger } from '@/lib/utils/logger';
+import { seedAsin } from '@/lib/services/works.service';
 
 const logger = RMABLogger.create('RequestCreator');
 
@@ -147,6 +148,15 @@ export async function createRequestForUser(
     }
   }
 
+  // Seed works table for cross-ASIN matching (Layer 2: request-time seeding)
+  seedAsin(
+    audiobook.asin,
+    audiobookRecord.title,
+    audiobookRecord.author,
+    audiobookRecord.narrator || undefined,
+    undefined // duration not available at request time
+  ).catch(() => {});
+
   // Check if user already has an active request for this audiobook
   const existingRequest = await prisma.request.findFirst({
     where: {

src/lib/services/scheduler.service.ts

@@ -10,7 +10,7 @@ import { RMABLogger } from '../utils/logger';
 
 const logger = RMABLogger.create('Scheduler');
 
-export type ScheduledJobType = 'plex_library_scan' | 'plex_recently_added_check' | 'audible_refresh' | 'retry_missing_torrents' | 'retry_failed_imports' | 'cleanup_seeded_torrents' | 'monitor_rss_feeds' | 'sync_reading_shelves';
+export type ScheduledJobType = 'plex_library_scan' | 'plex_recently_added_check' | 'audible_refresh' | 'retry_missing_torrents' | 'retry_failed_imports' | 'cleanup_seeded_torrents' | 'monitor_rss_feeds' | 'sync_reading_shelves' | 'check_watched_lists';
 
 export interface ScheduledJob {
   id: string;
@@ -136,6 +136,13 @@ export class SchedulerService {
         enabled: true, // Enable by default
         payload: {},
       },
+      {
+        name: 'Check Watched Lists',
+        type: 'check_watched_lists' as ScheduledJobType,
+        schedule: '0 0 * * *', // Daily at midnight (every 24 hours)
+        enabled: true, // Enable by default
+        payload: {},
+      },
     ];
 
     let created = 0;
@@ -381,6 +388,9 @@ export class SchedulerService {
       case 'sync_reading_shelves':
         bullJobId = await this.triggerSyncShelves(job);
         break;
+      case 'check_watched_lists':
+        bullJobId = await this.triggerCheckWatchedLists(job);
+        break;
       default:
         throw new Error(`Unknown job type: ${job.type}`);
     }
@@ -655,6 +665,13 @@ export class SchedulerService {
   private async triggerSyncShelves(job: any): Promise<string> {
     return await this.jobQueue.addSyncShelvesJob(job.id);
   }
+
+  /**
+   * Trigger watched lists check (watched series + watched authors)
+   */
+  private async triggerCheckWatchedLists(job: any): Promise<string> {
+    return await this.jobQueue.addCheckWatchedListsJob(job.id);
+  }
 }
 
 // Singleton instance

src/lib/services/watched-lists.service.ts

@@ -0,0 +1,414 @@
+/**
+ * Component: Watched Lists Service
+ * Documentation: documentation/features/watched-lists.md
+ *
+ * Checks watched series and watched authors for new releases.
+ * Deduplicates results using the works table, checks against user's library,
+ * and auto-creates requests via the shared request-creator service.
+ * Follows the same pattern as goodreads-sync.service.ts.
+ */
+
+import { prisma } from '@/lib/db';
+import { getAudibleService, AudibleAudiobook } from '@/lib/integrations/audible.service';
+import { scrapeSeriesPage } from '@/lib/integrations/audible-series';
+import { deduplicateAndCollectGroups } from '@/lib/utils/deduplicate-audiobooks';
+import { persistDedupGroups } from '@/lib/services/works.service';
+import { createRequestForUser } from '@/lib/services/request-creator.service';
+import { findPlexMatch } from '@/lib/utils/audiobook-matcher';
+import { getSiblingAsins } from '@/lib/services/works.service';
+import { RMABLogger } from '@/lib/utils/logger';
+
+const logger = RMABLogger.create('WatchedLists');
+
+/** Max books to process per series (avoid excessively long runs) */
+const MAX_BOOKS_PER_SERIES = 200;
+
+/** Max author book pages to scrape */
+const MAX_AUTHOR_PAGES = 4;
+
+/** Delay between scrapes to avoid rate limiting (ms) */
+const SCRAPE_DELAY_MS = 2000;
+
+export interface WatchedListsSyncStats {
+  seriesChecked: number;
+  authorsChecked: number;
+  booksFound: number;
+  requestsCreated: number;
+  skippedOwned: number;
+  skippedExisting: number;
+  errors: number;
+}
+
+export interface WatchedListsSyncOptions {
+  /** Process only this specific user (for targeted sync) */
+  userId?: string;
+  /** Process only this specific series (for immediate sync on watch) */
+  seriesAsin?: string;
+  /** Process only this specific author (for immediate sync on watch) */
+  authorAsin?: string;
+}
+
+/**
+ * Process all watched series and authors: scrape for new releases,
+ * deduplicate, check library ownership, and create requests.
+ * Called from the check_watched_lists processor.
+ */
+export async function processWatchedLists(
+  jobLogger?: ReturnType<typeof RMABLogger.forJob>,
+  options: WatchedListsSyncOptions = {}
+): Promise<WatchedListsSyncStats> {
+  const log = jobLogger || logger;
+  const stats: WatchedListsSyncStats = {
+    seriesChecked: 0,
+    authorsChecked: 0,
+    booksFound: 0,
+    requestsCreated: 0,
+    skippedOwned: 0,
+    skippedExisting: 0,
+    errors: 0,
+  };
+
+  // ---- Watched Series ----
+  await processAllWatchedSeries(log, stats, options);
+
+  // ---- Watched Authors ----
+  await processAllWatchedAuthors(log, stats, options);
+
+  log.info('Watched lists sync complete', {
+    seriesChecked: stats.seriesChecked,
+    authorsChecked: stats.authorsChecked,
+    booksFound: stats.booksFound,
+    requestsCreated: stats.requestsCreated,
+    skippedOwned: stats.skippedOwned,
+    skippedExisting: stats.skippedExisting,
+    errors: stats.errors,
+  });
+
+  return stats;
+}
+
+// ---------------------------------------------------------------------------
+// Watched Series
+// ---------------------------------------------------------------------------
+
+async function processAllWatchedSeries(
+  log: ReturnType<typeof RMABLogger.forJob> | ReturnType<typeof RMABLogger.create>,
+  stats: WatchedListsSyncStats,
+  options: WatchedListsSyncOptions
+): Promise<void> {
+  const whereClause: any = {};
+  if (options.userId) whereClause.userId = options.userId;
+  if (options.seriesAsin) whereClause.seriesAsin = options.seriesAsin;
+  const watchedSeries = await prisma.watchedSeries.findMany({
+    where: whereClause,
+    include: { user: { select: { id: true, plexUsername: true } } },
+  });
+
+  if (watchedSeries.length === 0) {
+    log.info('No watched series to process');
+    return;
+  }
+
+  // Group by seriesAsin to avoid re-scraping the same series for multiple users
+  const seriesByAsin = new Map<string, typeof watchedSeries>();
+  for (const ws of watchedSeries) {
+    const list = seriesByAsin.get(ws.seriesAsin) || [];
+    list.push(ws);
+    seriesByAsin.set(ws.seriesAsin, list);
+  }
+
+  log.info(`Processing ${seriesByAsin.size} unique watched series (${watchedSeries.length} total subscriptions)`);
+
+  for (const [seriesAsin, subscriptions] of seriesByAsin) {
+    try {
+      await processSeriesForUsers(seriesAsin, subscriptions, log, stats);
+    } catch (error) {
+      stats.errors++;
+      log.error(`Failed to process watched series ${seriesAsin}`, {
+        error: error instanceof Error ? error.message : String(error),
+      });
+    }
+
+    // Rate limit between series
+    await delay(SCRAPE_DELAY_MS);
+  }
+}
+
+async function processSeriesForUsers(
+  seriesAsin: string,
+  subscriptions: Array<{ id: string; seriesTitle: string; user: { id: string; plexUsername: string } }>,
+  log: ReturnType<typeof RMABLogger.forJob> | ReturnType<typeof RMABLogger.create>,
+  stats: WatchedListsSyncStats
+): Promise<void> {
+  const title = subscriptions[0].seriesTitle;
+  log.info(`Scraping watched series: "${title}" (${seriesAsin})`);
+
+  // Scrape all pages of the series (up to MAX_BOOKS_PER_SERIES)
+  const allBooks: AudibleAudiobook[] = [];
+  let page = 1;
+  let hasMore = true;
+
+  while (hasMore && allBooks.length < MAX_BOOKS_PER_SERIES) {
+    const result = await scrapeSeriesPage(seriesAsin, page);
+    if (!result || result.books.length === 0) break;
+
+    allBooks.push(...result.books);
+    hasMore = result.hasMore;
+    page++;
+
+    if (hasMore) await delay(1000);
+  }
+
+  if (allBooks.length === 0) {
+    log.info(`No books found for series "${title}"`);
+    stats.seriesChecked++;
+    return;
+  }
+
+  stats.booksFound += allBooks.length;
+
+  // Deduplicate
+  const { books: dedupedBooks, groups } = deduplicateAndCollectGroups(allBooks);
+
+  // Persist dedup groups (fire-and-forget)
+  if (groups.length > 0) {
+    persistDedupGroups(groups).catch(() => {});
+  }
+
+  // For each user watching this series, create requests for new books
+  for (const subscription of subscriptions) {
+    await createRequestsForUser(
+      subscription.user.id,
+      subscription.user.plexUsername,
+      dedupedBooks,
+      log,
+      stats
+    );
+
+    // Update lastCheckedAt
+    await prisma.watchedSeries.update({
+      where: { id: subscription.id },
+      data: { lastCheckedAt: new Date() },
+    }).catch(() => {});
+  }
+
+  stats.seriesChecked++;
+}
+
+// ---------------------------------------------------------------------------
+// Watched Authors
+// ---------------------------------------------------------------------------
+
+async function processAllWatchedAuthors(
+  log: ReturnType<typeof RMABLogger.forJob> | ReturnType<typeof RMABLogger.create>,
+  stats: WatchedListsSyncStats,
+  options: WatchedListsSyncOptions
+): Promise<void> {
+  const whereClause: any = {};
+  if (options.userId) whereClause.userId = options.userId;
+  if (options.authorAsin) whereClause.authorAsin = options.authorAsin;
+  const watchedAuthors = await prisma.watchedAuthor.findMany({
+    where: whereClause,
+    include: { user: { select: { id: true, plexUsername: true } } },
+  });
+
+  if (watchedAuthors.length === 0) {
+    log.info('No watched authors to process');
+    return;
+  }
+
+  // Group by authorAsin to avoid re-scraping the same author for multiple users
+  const authorsByAsin = new Map<string, typeof watchedAuthors>();
+  for (const wa of watchedAuthors) {
+    const list = authorsByAsin.get(wa.authorAsin) || [];
+    list.push(wa);
+    authorsByAsin.set(wa.authorAsin, list);
+  }
+
+  log.info(`Processing ${authorsByAsin.size} unique watched authors (${watchedAuthors.length} total subscriptions)`);
+
+  for (const [authorAsin, subscriptions] of authorsByAsin) {
+    try {
+      await processAuthorForUsers(authorAsin, subscriptions, log, stats);
+    } catch (error) {
+      stats.errors++;
+      log.error(`Failed to process watched author ${authorAsin}`, {
+        error: error instanceof Error ? error.message : String(error),
+      });
+    }
+
+    // Rate limit between authors
+    await delay(SCRAPE_DELAY_MS);
+  }
+}
+
+async function processAuthorForUsers(
+  authorAsin: string,
+  subscriptions: Array<{ id: string; authorName: string; user: { id: string; plexUsername: string } }>,
+  log: ReturnType<typeof RMABLogger.forJob> | ReturnType<typeof RMABLogger.create>,
+  stats: WatchedListsSyncStats
+): Promise<void> {
+  const authorName = subscriptions[0].authorName;
+  log.info(`Scraping watched author: "${authorName}" (${authorAsin})`);
+
+  const audibleService = getAudibleService();
+  const allBooks: AudibleAudiobook[] = [];
+  let page = 1;
+  let hasMore = true;
+
+  while (hasMore && page <= MAX_AUTHOR_PAGES) {
+    try {
+      const result = await audibleService.searchByAuthorAsin(authorName, authorAsin, page);
+      if (result.books.length === 0) break;
+
+      allBooks.push(...result.books);
+      hasMore = result.hasMore;
+      page++;
+
+      if (hasMore) await delay(1000);
+    } catch (error) {
+      log.error(`Failed to scrape author page ${page} for "${authorName}"`, {
+        error: error instanceof Error ? error.message : String(error),
+      });
+      break;
+    }
+  }
+
+  if (allBooks.length === 0) {
+    log.info(`No books found for author "${authorName}"`);
+    stats.authorsChecked++;
+    return;
+  }
+
+  stats.booksFound += allBooks.length;
+
+  // Deduplicate
+  const { books: dedupedBooks, groups } = deduplicateAndCollectGroups(allBooks);
+
+  // Persist dedup groups (fire-and-forget)
+  if (groups.length > 0) {
+    persistDedupGroups(groups).catch(() => {});
+  }
+
+  // For each user watching this author, create requests for new books
+  for (const subscription of subscriptions) {
+    await createRequestsForUser(
+      subscription.user.id,
+      subscription.user.plexUsername,
+      dedupedBooks,
+      log,
+      stats
+    );
+
+    // Update lastCheckedAt
+    await prisma.watchedAuthor.update({
+      where: { id: subscription.id },
+      data: { lastCheckedAt: new Date() },
+    }).catch(() => {});
+  }
+
+  stats.authorsChecked++;
+}
+
+// ---------------------------------------------------------------------------
+// Shared: Create requests for a user from a list of books
+// ---------------------------------------------------------------------------
+
+async function createRequestsForUser(
+  userId: string,
+  username: string,
+  books: AudibleAudiobook[],
+  log: ReturnType<typeof RMABLogger.forJob> | ReturnType<typeof RMABLogger.create>,
+  stats: WatchedListsSyncStats
+): Promise<void> {
+  // Filter to books that have an ASIN
+  const booksWithAsin = books.filter(b => b.asin);
+  if (booksWithAsin.length === 0) return;
+
+  // Batch check: which ASINs are already in library (direct + sibling expansion)
+  const ownedAsins = await getOwnedAsins(booksWithAsin.map(b => b.asin));
+
+  for (const book of booksWithAsin) {
+    // Skip if user already owns this (direct or via sibling ASIN)
+    if (ownedAsins.has(book.asin)) {
+      stats.skippedOwned++;
+      continue;
+    }
+
+    try {
+      const result = await createRequestForUser(userId, {
+        asin: book.asin,
+        title: book.title,
+        author: book.author,
+        narrator: book.narrator,
+        description: book.description,
+        coverArtUrl: book.coverArtUrl,
+      });
+
+      if (result.success) {
+        stats.requestsCreated++;
+        log.info(`Auto-requested "${book.title}" by ${book.author} for ${username}`);
+      } else {
+        // already_available, being_processed, duplicate — all expected
+        stats.skippedExisting++;
+      }
+    } catch (error) {
+      log.error(`Failed to create request for "${book.title}" for ${username}`, {
+        error: error instanceof Error ? error.message : String(error),
+      });
+    }
+  }
+}
+
+/**
+ * Get the set of ASINs that are already in the library (direct match + sibling expansion).
+ */
+async function getOwnedAsins(asins: string[]): Promise<Set<string>> {
+  const owned = new Set<string>();
+
+  // Direct library lookup
+  const libraryItems = await prisma.plexLibrary.findMany({
+    where: { asin: { in: asins } },
+    select: { asin: true },
+  });
+  for (const item of libraryItems) {
+    if (item.asin) owned.add(item.asin);
+  }
+
+  // Sibling expansion via works table
+  try {
+    const siblingMap = await getSiblingAsins(asins);
+    if (siblingMap.size > 0) {
+      const allSiblings = new Set<string>();
+      for (const siblings of siblingMap.values()) {
+        for (const s of siblings) allSiblings.add(s);
+      }
+
+      if (allSiblings.size > 0) {
+        const siblingLibrary = await prisma.plexLibrary.findMany({
+          where: { asin: { in: [...allSiblings] } },
+          select: { asin: true },
+        });
+
+        for (const item of siblingLibrary) {
+          if (item.asin) {
+            // Mark the original ASIN as owned (not the sibling)
+            for (const [originalAsin, siblings] of siblingMap) {
+              if (siblings.includes(item.asin)) {
+                owned.add(originalAsin);
+              }
+            }
+          }
+        }
+      }
+    }
+  } catch {
+    // Works table expansion is best-effort
+  }
+
+  return owned;
+}
+
+function delay(ms: number): Promise<void> {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}

src/lib/services/works.service.ts

@@ -0,0 +1,248 @@
+/**
+ * Component: Works Service
+ * Documentation: documentation/integrations/audible.md
+ *
+ * Manages the works table — persistent cross-ASIN audiobook identity mapping.
+ * Layer 1: Auto-populated from dedup logic when users browse search/author/series pages.
+ * Layer 2: Seeded at request time to ensure requested ASINs are tracked.
+ */
+
+import { prisma } from '@/lib/db';
+import { RMABLogger } from '@/lib/utils/logger';
+import type { DedupGroup } from '@/lib/utils/deduplicate-audiobooks';
+
+const logger = RMABLogger.create('WorksService');
+
+// ---------------------------------------------------------------------------
+// Layer 1: Persist dedup groups (fire-and-forget from API routes)
+// ---------------------------------------------------------------------------
+
+/**
+ * Persist dedup groups to the works table. For each group of 2+ ASINs that
+ * were identified as the same audiobook, create or update a Work record
+ * linking all ASINs together.
+ *
+ * Safe to call fire-and-forget — never throws.
+ */
+export async function persistDedupGroups(groups: DedupGroup[]): Promise<void> {
+  try {
+    for (const group of groups) {
+      await persistSingleGroup(group);
+    }
+  } catch (error) {
+    logger.error('Failed to persist dedup groups', {
+      error: error instanceof Error ? error.message : String(error),
+      groupCount: groups.length,
+    });
+  }
+}
+
+/**
+ * Persist a single dedup group. Handles merging when ASINs span multiple
+ * existing works.
+ */
+async function persistSingleGroup(group: DedupGroup): Promise<void> {
+  const { canonicalAsin, allAsins, title, author, narrator, durationMinutes } = group;
+
+  // Find which of these ASINs already exist in work_asins
+  const existingEntries = await prisma.workAsin.findMany({
+    where: { asin: { in: allAsins } },
+    select: { asin: true, workId: true },
+  });
+
+  // Collect unique work IDs that already contain any of our ASINs
+  const existingWorkIds = [...new Set(existingEntries.map(e => e.workId))];
+  const existingAsinSet = new Set(existingEntries.map(e => e.asin));
+
+  if (existingWorkIds.length === 0) {
+    // No existing works — create a new one with all ASINs
+    const work = await prisma.work.create({
+      data: { title, author },
+    });
+
+    await Promise.all(
+      allAsins.map(asin =>
+        prisma.workAsin.create({
+          data: {
+            workId: work.id,
+            asin,
+            narrator: asin === canonicalAsin ? narrator : undefined,
+            durationMinutes: asin === canonicalAsin ? durationMinutes : undefined,
+            isCanonical: asin === canonicalAsin,
+            source: 'dedup_auto',
+          },
+        })
+      )
+    );
+
+    logger.debug('Created new work', { workId: work.id, asinCount: allAsins.length });
+  } else {
+    // Use the first existing work as the target
+    const targetWorkId = existingWorkIds[0];
+
+    // If multiple existing works, merge them into the target
+    if (existingWorkIds.length > 1) {
+      const mergeWorkIds = existingWorkIds.slice(1);
+
+      // Move all ASINs from other works to the target
+      await prisma.workAsin.updateMany({
+        where: { workId: { in: mergeWorkIds } },
+        data: { workId: targetWorkId },
+      });
+
+      // Delete the now-empty works
+      await prisma.work.deleteMany({
+        where: { id: { in: mergeWorkIds } },
+      });
+
+      logger.debug('Merged works', {
+        targetWorkId,
+        mergedWorkIds: mergeWorkIds,
+      });
+    }
+
+    // Add any new ASINs that don't already exist
+    const newAsins = allAsins.filter(a => !existingAsinSet.has(a));
+    if (newAsins.length > 0) {
+      await Promise.all(
+        newAsins.map(asin =>
+          prisma.workAsin.create({
+            data: {
+              workId: targetWorkId,
+              asin,
+              narrator: asin === canonicalAsin ? narrator : undefined,
+              durationMinutes: asin === canonicalAsin ? durationMinutes : undefined,
+              isCanonical: asin === canonicalAsin,
+              source: 'dedup_auto',
+            },
+          })
+        )
+      );
+
+      logger.debug('Added ASINs to existing work', {
+        workId: targetWorkId,
+        newAsinCount: newAsins.length,
+      });
+    }
+
+    // Update canonical status: ensure the canonical ASIN is marked
+    await prisma.workAsin.updateMany({
+      where: { workId: targetWorkId, asin: canonicalAsin },
+      data: { isCanonical: true },
+    });
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Layer 2: Seed ASIN at request time
+// ---------------------------------------------------------------------------
+
+/**
+ * Ensure an ASIN is tracked in the works table. Creates a single-ASIN work
+ * if the ASIN isn't already present. Called at request creation time.
+ *
+ * Safe to call fire-and-forget — never throws.
+ */
+export async function seedAsin(
+  asin: string,
+  title: string,
+  author: string,
+  narrator?: string,
+  durationMinutes?: number
+): Promise<void> {
+  try {
+    // Check if ASIN already tracked
+    const existing = await prisma.workAsin.findUnique({
+      where: { asin },
+    });
+    if (existing) return;
+
+    // Create a new single-ASIN work
+    const work = await prisma.work.create({
+      data: { title, author },
+    });
+
+    await prisma.workAsin.create({
+      data: {
+        workId: work.id,
+        asin,
+        narrator,
+        durationMinutes,
+        isCanonical: true,
+        source: 'dedup_auto',
+      },
+    });
+
+    logger.debug('Seeded ASIN', { workId: work.id, asin });
+  } catch (error) {
+    logger.error('Failed to seed ASIN', {
+      error: error instanceof Error ? error.message : String(error),
+      asin,
+    });
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Sibling ASIN lookup (for library matching expansion)
+// ---------------------------------------------------------------------------
+
+/**
+ * Given a list of ASINs, return a map of each input ASIN to its sibling ASINs
+ * (other ASINs in the same work, NOT including the input ASIN itself).
+ *
+ * ASINs not found in the works table are simply omitted from the result.
+ */
+export async function getSiblingAsins(
+  asins: string[]
+): Promise<Map<string, string[]>> {
+  const result = new Map<string, string[]>();
+  if (asins.length === 0) return result;
+
+  // Step 1: Find which input ASINs are in work_asins and their work IDs
+  const inputEntries = await prisma.workAsin.findMany({
+    where: { asin: { in: asins } },
+    select: { asin: true, workId: true },
+  });
+
+  if (inputEntries.length === 0) return result;
+
+  // Build map of workId -> input ASINs in that work
+  const workIdToInputAsins = new Map<string, string[]>();
+  for (const entry of inputEntries) {
+    const list = workIdToInputAsins.get(entry.workId);
+    if (list) {
+      list.push(entry.asin);
+    } else {
+      workIdToInputAsins.set(entry.workId, [entry.asin]);
+    }
+  }
+
+  // Step 2: Get ALL ASINs in those works
+  const workIds = [...workIdToInputAsins.keys()];
+  const allWorkAsins = await prisma.workAsin.findMany({
+    where: { workId: { in: workIds } },
+    select: { asin: true, workId: true },
+  });
+
+  // Build map of workId -> all ASINs
+  const workIdToAllAsins = new Map<string, string[]>();
+  for (const entry of allWorkAsins) {
+    const list = workIdToAllAsins.get(entry.workId);
+    if (list) {
+      list.push(entry.asin);
+    } else {
+      workIdToAllAsins.set(entry.workId, [entry.asin]);
+    }
+  }
+
+  // Step 3: For each input ASIN, compute siblings (all ASINs in same work minus self)
+  for (const entry of inputEntries) {
+    const allInWork = workIdToAllAsins.get(entry.workId) || [];
+    const siblings = allInWork.filter(a => a !== entry.asin);
+    if (siblings.length > 0) {
+      result.set(entry.asin, siblings);
+    }
+  }
+
+  return result;
+}

src/lib/utils/audiobook-matcher.ts

@@ -8,6 +8,7 @@
 
 import { prisma } from '@/lib/db';
 import { LibraryItem } from '@/lib/services/library';
+import { getSiblingAsins } from '@/lib/services/works.service';
 import { RMABLogger } from './logger';
 
 // Module-level logger
@@ -178,6 +179,61 @@ export async function enrichAudiobooksWithMatches(
     }
   }
 
+  // Works-table sibling expansion: check if unmatched ASINs have siblings in the library
+  try {
+    const unmatchedAsins = results.filter(r => !r.isAvailable).map(r => r.asin);
+    if (unmatchedAsins.length > 0) {
+      const siblingMap = await getSiblingAsins(unmatchedAsins);
+      if (siblingMap.size > 0) {
+        // Collect all sibling ASINs for a single batch library query
+        const allSiblingAsins = new Set<string>();
+        for (const siblings of siblingMap.values()) {
+          for (const s of siblings) allSiblingAsins.add(s);
+        }
+
+        if (allSiblingAsins.size > 0) {
+          const siblingLibraryMatches = await prisma.plexLibrary.findMany({
+            where: { asin: { in: [...allSiblingAsins] } },
+            select: { asin: true, plexGuid: true },
+          });
+          const libraryAsinSet = new Set(
+            siblingLibraryMatches.filter(m => m.asin).map(m => m.asin!.toLowerCase())
+          );
+
+          // Update results where a sibling ASIN is found in the library
+          for (const result of results) {
+            if (result.isAvailable) continue;
+            const siblings = siblingMap.get(result.asin);
+            if (!siblings) continue;
+            const matchedSiblingAsin = siblings.find(s => libraryAsinSet.has(s.toLowerCase()));
+            if (matchedSiblingAsin) {
+              const libMatch = siblingLibraryMatches.find(
+                m => m.asin?.toLowerCase() === matchedSiblingAsin.toLowerCase()
+              );
+              (result as any).isAvailable = true;
+              (result as any).plexGuid = libMatch?.plexGuid || null;
+            }
+          }
+
+          const siblingMatchCount = results.filter(r => {
+            if (!r.isAvailable) return false;
+            return siblingMap.has(r.asin);
+          }).length;
+          logger.debug('Sibling expansion', {
+            unmatchedCount: unmatchedAsins.length,
+            siblingGroupsFound: siblingMap.size,
+            siblingMatches: siblingMatchCount,
+          });
+        }
+      }
+    }
+  } catch (error) {
+    // Works table expansion is best-effort — direct matches still work
+    logger.error('Sibling ASIN expansion failed', {
+      error: error instanceof Error ? error.message : String(error),
+    });
+  }
+
   // Always enrich with request status (check ANY user's requests)
   const asins = audiobooks.map(book => book.asin);
 
@@ -272,6 +328,57 @@ export async function enrichAudiobooksWithMatches(
   return results;
 }
 
+/**
+ * Get all ASINs that are considered "available" — present in library or have completed requests.
+ * Used by paginated API routes to exclude available items at the DB level.
+ */
+export async function getAvailableAsins(): Promise<Set<string>> {
+  const [libraryItems, completedRequests] = await Promise.all([
+    // ASINs present in the library (Plex or Audiobookshelf)
+    prisma.plexLibrary.findMany({
+      where: { asin: { not: null } },
+      select: { asin: true },
+      distinct: ['asin'],
+    }),
+    // ASINs with completed audiobook requests
+    prisma.audiobook.findMany({
+      where: {
+        audibleAsin: { not: null },
+        requests: {
+          some: {
+            status: 'completed',
+            type: 'audiobook',
+            deletedAt: null,
+          },
+        },
+      },
+      select: { audibleAsin: true },
+    }),
+  ]);
+
+  const asins = new Set<string>();
+  for (const item of libraryItems) {
+    if (item.asin) asins.add(item.asin);
+  }
+  for (const item of completedRequests) {
+    if (item.audibleAsin) asins.add(item.audibleAsin);
+  }
+
+  // Expand with works-table sibling ASINs
+  try {
+    if (asins.size > 0) {
+      const siblingMap = await getSiblingAsins([...asins]);
+      for (const siblings of siblingMap.values()) {
+        for (const s of siblings) asins.add(s);
+      }
+    }
+  } catch {
+    // Works table expansion is best-effort
+  }
+
+  return asins;
+}
+
 /**
  * Normalize ISBN for comparison (remove dashes and spaces)
  */

src/lib/utils/deduplicate-audiobooks.ts

@@ -0,0 +1,203 @@
+/**
+ * Component: Audiobook Deduplication Utility
+ * Documentation: documentation/integrations/audible.md
+ *
+ * Deduplicates audiobook listings that represent the same recording
+ * under different ASINs (publisher re-listings, rights transfers, etc.).
+ *
+ * Dedup key: normalized title + normalized narrator
+ * Duration tolerance: max(longerDuration * 0.01, 5) minutes
+ * Missing duration treated as compatible (graceful degradation).
+ */
+
+import type { AudibleAudiobook } from '../integrations/audible.service';
+
+// ---------------------------------------------------------------------------
+// Title / narrator normalization
+// ---------------------------------------------------------------------------
+
+/** Patterns in parentheses or brackets to strip (edition markers, format labels) */
+const EDITION_PAREN_RE = /[([][^)\]]*?(?:unabridged|abridged|edition|remaster(?:ed)?|anniversary|complete|original|version|narrat(?:ed|or)?|audio(?:book)?|full cast|dramatiz(?:ed|ation))[^)\]]*[)\]]/gi;
+
+/** Trailing subtitle after colon or long dash */
+const SUBTITLE_RE = /\s*[:]\s+.+$/;
+const LONG_DASH_SUBTITLE_RE = /\s+[-\u2013\u2014]\s+.+$/;
+
+/** Trailing descriptors like "A Novel", "A Memoir" */
+const TRAILING_DESCRIPTOR_RE = /\s*[-:,]?\s+a\s+(novel|memoir|thriller|mystery|romance|story|tale|novella)\s*$/i;
+
+/**
+ * Normalize a title for dedup comparison.
+ * Strips subtitles, edition markers, and trailing descriptors.
+ */
+export function normalizeTitle(title: string): string {
+  let t = title.toLowerCase();
+  // Remove parenthesized/bracketed edition markers
+  t = t.replace(EDITION_PAREN_RE, '');
+  // Remove trailing descriptors before subtitle stripping
+  t = t.replace(TRAILING_DESCRIPTOR_RE, '');
+  // Remove subtitle after colon
+  t = t.replace(SUBTITLE_RE, '');
+  // Remove subtitle after long dash (but not short hyphenated words)
+  t = t.replace(LONG_DASH_SUBTITLE_RE, '');
+  // Collapse whitespace and trim
+  return t.replace(/\s+/g, ' ').trim();
+}
+
+/** Normalize narrator for comparison. Sorts individual names so order doesn't matter. */
+function normalizeNarrator(narrator?: string): string {
+  const raw = (narrator || '').toLowerCase().trim();
+  if (!raw) return raw;
+  return raw.split(',').map(n => n.trim()).filter(Boolean).sort().join(', ');
+}
+
+// ---------------------------------------------------------------------------
+// Duration compatibility
+// ---------------------------------------------------------------------------
+
+/**
+ * Check if two durations are compatible (represent the same recording).
+ * Tolerance: max(longerDuration * 0.01, 5) minutes.
+ * Missing duration on either side is treated as compatible.
+ */
+export function areDurationsCompatible(a?: number, b?: number): boolean {
+  if (a == null || b == null) return true;
+  const longer = Math.max(a, b);
+  const tolerance = Math.max(longer * 0.01, 5);
+  return Math.abs(a - b) <= tolerance;
+}
+
+// ---------------------------------------------------------------------------
+// Metadata scoring (for picking best representative)
+// ---------------------------------------------------------------------------
+
+function metadataScore(book: AudibleAudiobook): number {
+  let score = 0;
+  if (book.coverArtUrl) score++;
+  if (book.rating != null) score++;
+  if (book.durationMinutes != null) score++;
+  if (book.description) score++;
+  if (book.narrator) score++;
+  if (book.releaseDate) score++;
+  if (book.genres && book.genres.length > 0) score++;
+  return score;
+}
+
+// ---------------------------------------------------------------------------
+// Dedup group types (for works-table persistence)
+// ---------------------------------------------------------------------------
+
+/** Metadata about a group of ASINs that were collapsed during dedup. */
+export interface DedupGroup {
+  canonicalAsin: string;     // ASIN of the "winner" (best metadata score)
+  allAsins: string[];        // All ASINs in this group (including canonical)
+  title: string;             // Author from the canonical entry
+  author: string;            // Author from the canonical entry
+  narrator?: string;         // Narrator from the canonical entry
+  durationMinutes?: number;  // Duration from the canonical entry
+}
+
+/** Result of deduplication with group collection. */
+export interface DeduplicateResult {
+  books: AudibleAudiobook[];  // The deduped list (same as deduplicateAudiobooks returns)
+  groups: DedupGroup[];       // Groups where 2+ ASINs were collapsed
+}
+
+// ---------------------------------------------------------------------------
+// Main dedup functions
+// ---------------------------------------------------------------------------
+
+/**
+ * Deduplicate audiobook listings by normalized title + narrator + duration.
+ *
+ * Same narrator + compatible duration + similar title = same recording -> collapse.
+ * Different narrator = different production -> keep both.
+ * Duration outside tolerance = different content (abridged vs unabridged) -> keep both.
+ *
+ * Preserves original ordering (position of first appearance).
+ */
+export function deduplicateAudiobooks(books: AudibleAudiobook[]): AudibleAudiobook[] {
+  return deduplicateAndCollectGroups(books).books;
+}
+
+/**
+ * Deduplicate audiobooks AND return grouping metadata for works-table persistence.
+ * Returns both the deduped list and the groups where 2+ ASINs were collapsed.
+ */
+export function deduplicateAndCollectGroups(books: AudibleAudiobook[]): DeduplicateResult {
+  if (books.length <= 1) return { books: [...books], groups: [] };
+
+  // Group by normalized title + narrator
+  const titleNarratorGroups = new Map<string, AudibleAudiobook[]>();
+  const insertionOrder: string[] = [];
+
+  for (const book of books) {
+    const key = `${normalizeTitle(book.title)}|||${normalizeNarrator(book.narrator)}`;
+    const group = titleNarratorGroups.get(key);
+    if (group) {
+      group.push(book);
+    } else {
+      titleNarratorGroups.set(key, [book]);
+      insertionOrder.push(key);
+    }
+  }
+
+  const result: AudibleAudiobook[] = [];
+  const dedupGroups: DedupGroup[] = [];
+
+  for (const key of insertionOrder) {
+    const group = titleNarratorGroups.get(key)!;
+    if (group.length === 1) {
+      result.push(group[0]);
+      continue;
+    }
+
+    // Within a title+narrator group, further split by duration compatibility.
+    // Build sub-groups where all members are duration-compatible with the
+    // representative (first member). A book joins the first compatible sub-group.
+    const subGroups: AudibleAudiobook[][] = [];
+
+    for (const book of group) {
+      let placed = false;
+      for (const sg of subGroups) {
+        // Check compatibility against the representative (first member)
+        if (areDurationsCompatible(sg[0].durationMinutes, book.durationMinutes)) {
+          sg.push(book);
+          placed = true;
+          break;
+        }
+      }
+      if (!placed) {
+        subGroups.push([book]);
+      }
+    }
+
+    // From each sub-group, pick the best representative and collect group metadata
+    for (const sg of subGroups) {
+      let best = sg[0];
+      let bestScore = metadataScore(best);
+      for (let i = 1; i < sg.length; i++) {
+        const score = metadataScore(sg[i]);
+        if (score > bestScore) {
+          best = sg[i];
+          bestScore = score;
+        }
+      }
+      result.push(best);
+
+      // Collect group metadata for works-table persistence (only multi-ASIN groups)
+      if (sg.length >= 2) {
+        dedupGroups.push({
+          canonicalAsin: best.asin,
+          allAsins: sg.map(b => b.asin),
+          title: best.title,
+          author: best.author,
+          narrator: best.narrator,
+          durationMinutes: best.durationMinutes,
+        });
+      }
+    }
+  }
+
+  return { books: result, groups: dedupGroups };
+}

src/lib/utils/parse-runtime.ts

@@ -0,0 +1,44 @@
+/**
+ * Component: Runtime Parsing Utility
+ * Documentation: documentation/integrations/audible.md
+ *
+ * Shared runtime/duration text parser extracted from AudibleService.
+ * Handles all i18n patterns (English, German, Spanish, French) via
+ * language-specific regex patterns in LanguageConfig.
+ */
+
+import type { LanguageConfig } from '../constants/language-config';
+
+/**
+ * Parse runtime text (e.g. "12 hrs and 30 mins", "5 Std. 20 Min.")
+ * into total minutes using language-specific patterns.
+ *
+ * @param runtimeText - Raw runtime string from Audible HTML
+ * @param langConfig  - Language configuration with hour/minute regex patterns
+ * @returns Total minutes, or undefined if no duration could be parsed
+ */
+export function parseRuntime(runtimeText: string, langConfig: LanguageConfig): number | undefined {
+  if (!runtimeText) return undefined;
+
+  let totalMinutes = 0;
+
+  // Try each hour pattern until one matches
+  for (const pattern of langConfig.scraping.runtimeHourPatterns) {
+    const match = runtimeText.match(pattern);
+    if (match) {
+      totalMinutes += parseInt(match[1]) * 60;
+      break;
+    }
+  }
+
+  // Try each minute pattern until one matches
+  for (const pattern of langConfig.scraping.runtimeMinutePatterns) {
+    const match = runtimeText.match(pattern);
+    if (match) {
+      totalMinutes += parseInt(match[1]);
+      break;
+    }
+  }
+
+  return totalMinutes > 0 ? totalMinutes : undefined;
+}

tests/app/home.page.test.tsx

@@ -47,17 +47,22 @@ vi.mock('@/components/ui/CardSizeControls', () => ({
   CardSizeControls: ({ size }: { size: number }) => <div data-testid="card-size" data-size={size} />,
 }));
 
-vi.mock('@/components/ui/StickyPagination', () => ({
+vi.mock('@/components/ui/UnifiedPagination', () => ({
-  StickyPagination: ({
+  UnifiedPagination: ({
-    label,
+    sections,
-    onPageChange,
   }: {
+    sections: Array<{
       label: string;
       onPageChange: (page: number) => void;
+    }>;
   }) => (
-    <button type="button" onClick={() => onPageChange(2)}>
+    <div>
-      {label} next
+      {sections.map((s) => (
+        <button key={s.label} type="button" onClick={() => s.onPageChange(2)}>
+          {s.label} next
         </button>
+      ))}
+    </div>
   ),
 }));
 
@@ -113,7 +118,7 @@ describe('HomePage', () => {
     fireEvent.click(screen.getByRole('button', { name: 'Popular Audiobooks next' }));
 
     await waitFor(() => {
-      expect(useAudiobooksMock).toHaveBeenCalledWith('popular', 20, 2);
+      expect(useAudiobooksMock).toHaveBeenCalledWith('popular', 20, 2, undefined);
     });
   });
 });

tests/components/ui/StickyPagination.test.tsx

@@ -1,133 +0,0 @@
-/**
- * Component: Sticky Pagination Tests
- * Documentation: documentation/frontend/components.md
- */
-
-// @vitest-environment jsdom
-
-import React from 'react';
-import { act, fireEvent, render, screen } from '@testing-library/react';
-import { beforeEach, describe, expect, it, vi } from 'vitest';
-import { StickyPagination } from '@/components/ui/StickyPagination';
-
-type ObserverEntry = {
-  isIntersecting: boolean;
-  intersectionRatio: number;
-  target: Element;
-};
-
-describe('StickyPagination', () => {
-  const observers: { callback: IntersectionObserverCallback }[] = [];
-
-  beforeEach(() => {
-    observers.length = 0;
-    class MockIntersectionObserver {
-      callback: IntersectionObserverCallback;
-      observe = vi.fn();
-      unobserve = vi.fn();
-      disconnect = vi.fn();
-      takeRecords = vi.fn();
-
-      constructor(callback: IntersectionObserverCallback) {
-        this.callback = callback;
-        observers.push(this);
-      }
-    }
-
-    (global as any).IntersectionObserver = MockIntersectionObserver;
-  });
-
-  it('returns null when there is only one page', () => {
-    const sectionRef = { current: document.createElement('div') };
-    const { container } = render(
-      <StickyPagination
-        currentPage={1}
-        totalPages={1}
-        onPageChange={vi.fn()}
-        sectionRef={sectionRef}
-        label="Popular"
-      />
-    );
-
-    expect(container.firstChild).toBeNull();
-  });
-
-  it('shows and hides based on section and footer visibility', () => {
-    const sectionRef = { current: document.createElement('div') };
-    const footerRef = { current: document.createElement('div') };
-
-    const { container } = render(
-      <StickyPagination
-        currentPage={2}
-        totalPages={5}
-        onPageChange={vi.fn()}
-        sectionRef={sectionRef}
-        footerRef={footerRef}
-        label="Popular"
-      />
-    );
-
-    const root = container.querySelector('div.fixed') as HTMLElement;
-    expect(root).toHaveClass('opacity-0');
-
-    act(() => {
-      observers[0].callback(
-        [
-          {
-            isIntersecting: true,
-            intersectionRatio: 0.2,
-            target: sectionRef.current as Element,
-          } as ObserverEntry,
-        ],
-        observers[0] as unknown as IntersectionObserver
-      );
-    });
-
-    expect(root).toHaveClass('opacity-100');
-
-    act(() => {
-      observers[1].callback(
-        [
-          {
-            isIntersecting: true,
-            intersectionRatio: 0.2,
-            target: footerRef.current as Element,
-          } as ObserverEntry,
-        ],
-        observers[1] as unknown as IntersectionObserver
-      );
-    });
-
-    expect(root).toHaveClass('opacity-0');
-  });
-
-  it('handles navigation and jump input updates', () => {
-    const sectionRef = { current: document.createElement('div') };
-    const onPageChange = vi.fn();
-
-    render(
-      <StickyPagination
-        currentPage={2}
-        totalPages={4}
-        onPageChange={onPageChange}
-        sectionRef={sectionRef}
-        label="Popular"
-      />
-    );
-
-    fireEvent.click(screen.getByLabelText('Next page'));
-    expect(onPageChange).toHaveBeenCalledWith(3);
-
-    fireEvent.click(screen.getByLabelText('Previous page'));
-    expect(onPageChange).toHaveBeenCalledWith(1);
-
-    const input = screen.getByLabelText('Current page') as HTMLInputElement;
-    fireEvent.change(input, { target: { value: '4' } });
-    fireEvent.blur(input);
-    expect(onPageChange).toHaveBeenCalledWith(4);
-
-    fireEvent.change(input, { target: { value: '99' } });
-    fireEvent.blur(input);
-    expect(input.value).toBe('2');
-  });
-});

tests/components/ui/UnifiedPagination.test.tsx

@@ -0,0 +1,203 @@
+/**
+ * Component: Unified Pagination Tests
+ * Documentation: documentation/frontend/components.md
+ */
+
+// @vitest-environment jsdom
+
+import React from 'react';
+import { act, fireEvent, render, screen } from '@testing-library/react';
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { UnifiedPagination, PaginationSection } from '@/components/ui/UnifiedPagination';
+
+type ObserverEntry = {
+  isIntersecting: boolean;
+  intersectionRatio: number;
+  target: Element;
+};
+
+function makeSections(
+  overrides?: Partial<PaginationSection>[]
+): [PaginationSection, PaginationSection] {
+  const defaults: [PaginationSection, PaginationSection] = [
+    {
+      label: 'Popular',
+      accentColor: 'bg-blue-500',
+      currentPage: 1,
+      totalPages: 3,
+      onPageChange: vi.fn(),
+      sectionRef: { current: document.createElement('section') },
+      onScrollToSection: vi.fn(),
+    },
+    {
+      label: 'New Releases',
+      accentColor: 'bg-emerald-500',
+      currentPage: 1,
+      totalPages: 2,
+      onPageChange: vi.fn(),
+      sectionRef: { current: document.createElement('section') },
+      onScrollToSection: vi.fn(),
+    },
+  ];
+
+  if (overrides) {
+    overrides.forEach((o, i) => {
+      if (o) Object.assign(defaults[i], o);
+    });
+  }
+
+  return defaults;
+}
+
+describe('UnifiedPagination', () => {
+  const observers: { callback: IntersectionObserverCallback; observe: ReturnType<typeof vi.fn>; disconnect: ReturnType<typeof vi.fn> }[] = [];
+
+  beforeEach(() => {
+    observers.length = 0;
+
+    class MockIntersectionObserver {
+      callback: IntersectionObserverCallback;
+      observe = vi.fn();
+      unobserve = vi.fn();
+      disconnect = vi.fn();
+      takeRecords = vi.fn();
+
+      constructor(callback: IntersectionObserverCallback) {
+        this.callback = callback;
+        observers.push(this);
+      }
+    }
+
+    (global as any).IntersectionObserver = MockIntersectionObserver;
+  });
+
+  it('renders nothing when both sections have only one page', () => {
+    const sections = makeSections([{ totalPages: 1 }, { totalPages: 1 }]);
+    const { container } = render(<UnifiedPagination sections={sections} />);
+    // The pill should be hidden (pointer-events-none, opacity-0)
+    const root = container.querySelector('div.fixed') as HTMLElement;
+    expect(root).toHaveClass('pointer-events-none');
+  });
+
+  it('shows pagination when the dominant section is visible and has pages', () => {
+    const sections = makeSections();
+    const { container } = render(<UnifiedPagination sections={sections} />);
+
+    const root = container.querySelector('div.fixed') as HTMLElement;
+    expect(root).toHaveClass('opacity-0');
+
+    // Simulate first section becoming visible with high ratio
+    act(() => {
+      observers[0].callback(
+        [
+          {
+            isIntersecting: true,
+            intersectionRatio: 0.5,
+            target: sections[0].sectionRef.current as Element,
+          } as ObserverEntry,
+        ],
+        observers[0] as unknown as IntersectionObserver
+      );
+    });
+
+    expect(root).toHaveClass('opacity-100');
+  });
+
+  it('hides when footer becomes visible', () => {
+    const sections = makeSections();
+    const footerRef = { current: document.createElement('footer') };
+    const { container } = render(
+      <UnifiedPagination sections={sections} footerRef={footerRef} />
+    );
+
+    const root = container.querySelector('div.fixed') as HTMLElement;
+
+    // Make section visible
+    act(() => {
+      observers[0].callback(
+        [
+          {
+            isIntersecting: true,
+            intersectionRatio: 0.5,
+            target: sections[0].sectionRef.current as Element,
+          } as ObserverEntry,
+        ],
+        observers[0] as unknown as IntersectionObserver
+      );
+    });
+
+    expect(root).toHaveClass('opacity-100');
+
+    // Footer observer is the 3rd (index 2): section0, section1, footer
+    act(() => {
+      observers[2].callback(
+        [
+          {
+            isIntersecting: true,
+            intersectionRatio: 0.1,
+            target: footerRef.current as Element,
+          } as ObserverEntry,
+        ],
+        observers[2] as unknown as IntersectionObserver
+      );
+    });
+
+    expect(root).toHaveClass('opacity-0');
+  });
+
+  it('calls onPageChange for prev/next buttons', () => {
+    const sections = makeSections([{ currentPage: 2, totalPages: 4 }]);
+    const { container } = render(<UnifiedPagination sections={sections} />);
+
+    // Make section visible so controls render interactably
+    act(() => {
+      observers[0].callback(
+        [
+          {
+            isIntersecting: true,
+            intersectionRatio: 0.5,
+            target: sections[0].sectionRef.current as Element,
+          } as ObserverEntry,
+        ],
+        observers[0] as unknown as IntersectionObserver
+      );
+    });
+
+    fireEvent.click(screen.getByLabelText('Next page'));
+    expect(sections[0].onPageChange).toHaveBeenCalledWith(3);
+
+    fireEvent.click(screen.getByLabelText('Previous page'));
+    expect(sections[0].onPageChange).toHaveBeenCalledWith(1);
+  });
+
+  it('handles page jump input', () => {
+    const sections = makeSections([{ currentPage: 2, totalPages: 5 }]);
+    render(<UnifiedPagination sections={sections} />);
+
+    // Make section visible
+    act(() => {
+      observers[0].callback(
+        [
+          {
+            isIntersecting: true,
+            intersectionRatio: 0.5,
+            target: sections[0].sectionRef.current as Element,
+          } as ObserverEntry,
+        ],
+        observers[0] as unknown as IntersectionObserver
+      );
+    });
+
+    const input = screen.getByLabelText('Jump to page') as HTMLInputElement;
+    fireEvent.change(input, { target: { value: '4' } });
+    fireEvent.blur(input);
+    expect(sections[0].onPageChange).toHaveBeenCalledWith(4);
+  });
+
+  it('uses pointer-events-none when hidden', () => {
+    const sections = makeSections();
+    const { container } = render(<UnifiedPagination sections={sections} />);
+    const root = container.querySelector('div.fixed') as HTMLElement;
+    expect(root).toHaveClass('pointer-events-none');
+  });
+});

tests/helpers/prisma.ts

@@ -48,6 +48,10 @@ export const createPrismaMock = () => ({
   goodreadsShelf: createModelMock(),
   goodreadsBookMapping: createModelMock(),
   hardcoverShelf: createModelMock(),
+  work: createModelMock(),
+  workAsin: createModelMock(),
+  watchedSeries: createModelMock(),
+  watchedAuthor: createModelMock(),
   $queryRaw: vi.fn(),
   $disconnect: vi.fn(),
 });

tests/services/job-queue.service.test.ts

@@ -22,6 +22,7 @@ const processorsMock = vi.hoisted(() => ({
   processRetryFailedImports: vi.fn().mockResolvedValue('ok'),
   processCleanupSeededTorrents: vi.fn().mockResolvedValue('ok'),
   processSyncShelves: vi.fn().mockResolvedValue('ok'),
+  processCheckWatchedLists: vi.fn().mockResolvedValue('ok'),
   // Ebook processors
   processSearchEbook: vi.fn().mockResolvedValue('ok'),
   processStartDirectDownload: vi.fn().mockResolvedValue('ok'),
@@ -120,6 +121,10 @@ vi.mock('@/lib/processors/sync-shelves.processor', () => ({
   processSyncShelves: processorsMock.processSyncShelves,
 }));
 
+vi.mock('@/lib/processors/check-watched-lists.processor', () => ({
+  processCheckWatchedLists: processorsMock.processCheckWatchedLists,
+}));
+
 // Ebook processors
 vi.mock('@/lib/processors/search-ebook.processor', () => ({
   processSearchEbook: processorsMock.processSearchEbook,
@@ -565,6 +570,7 @@ describe('JobQueueService', () => {
     expect(processorsMock.processRetryFailedImports).toHaveBeenCalled();
     expect(processorsMock.processCleanupSeededTorrents).toHaveBeenCalled();
     expect(processorsMock.processSyncShelves).toHaveBeenCalled();
+    expect(processorsMock.processCheckWatchedLists).toHaveBeenCalled();
   });
 
   it('returns repeatable jobs from the queue', async () => {

tests/services/scheduler.service.test.ts

@@ -81,7 +81,7 @@ describe('SchedulerService', () => {
     const service = new SchedulerService();
     await service.start();
 
-    expect(prismaMock.scheduledJob.create).toHaveBeenCalledTimes(8);
+    expect(prismaMock.scheduledJob.create).toHaveBeenCalledTimes(9);
     expect(jobQueueMock.addRepeatableJob).toHaveBeenCalledWith(
       'audible_refresh',
       { scheduledJobId: 'job-1' },

tests/services/watched-lists.service.test.ts

@@ -0,0 +1,588 @@
+/**
+ * Component: Watched Lists Service Tests
+ * Documentation: documentation/features/watched-lists.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { createPrismaMock } from '../helpers/prisma';
+
+const prismaMock = createPrismaMock();
+
+vi.mock('@/lib/db', () => ({
+  prisma: prismaMock,
+}));
+
+vi.mock('@/lib/utils/logger', () => ({
+  RMABLogger: {
+    create: () => ({
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    }),
+    forJob: () => ({
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    }),
+  },
+}));
+
+// Mock scrapeSeriesPage
+const mockScrapeSeriesPage = vi.fn();
+vi.mock('@/lib/integrations/audible-series', () => ({
+  scrapeSeriesPage: (...args: any[]) => mockScrapeSeriesPage(...args),
+}));
+
+// Mock AudibleService
+const mockSearchByAuthorAsin = vi.fn();
+vi.mock('@/lib/integrations/audible.service', () => ({
+  getAudibleService: () => ({
+    searchByAuthorAsin: mockSearchByAuthorAsin,
+  }),
+}));
+
+// Mock deduplicateAndCollectGroups
+const mockDeduplicateAndCollectGroups = vi.fn();
+vi.mock('@/lib/utils/deduplicate-audiobooks', () => ({
+  deduplicateAndCollectGroups: (...args: any[]) => mockDeduplicateAndCollectGroups(...args),
+}));
+
+// Mock works service
+const mockPersistDedupGroups = vi.fn();
+const mockGetSiblingAsins = vi.fn();
+vi.mock('@/lib/services/works.service', () => ({
+  persistDedupGroups: (...args: any[]) => mockPersistDedupGroups(...args),
+  getSiblingAsins: (...args: any[]) => mockGetSiblingAsins(...args),
+}));
+
+// Mock request creator
+const mockCreateRequestForUser = vi.fn();
+vi.mock('@/lib/services/request-creator.service', () => ({
+  createRequestForUser: (...args: any[]) => mockCreateRequestForUser(...args),
+}));
+
+// Mock findPlexMatch
+vi.mock('@/lib/utils/audiobook-matcher', () => ({
+  findPlexMatch: vi.fn().mockResolvedValue(null),
+}));
+
+describe('processWatchedLists', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.resetModules();
+
+    // Default: empty library, no siblings
+    prismaMock.plexLibrary.findMany.mockResolvedValue([]);
+    mockGetSiblingAsins.mockResolvedValue(new Map());
+    mockPersistDedupGroups.mockResolvedValue(undefined);
+  });
+
+  it('processes watched series and creates requests for new books', async () => {
+    // Setup: one user watching one series
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Test Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    // Series page returns 2 books
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Test Series',
+      bookCount: 2,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A', narrator: 'Narrator' },
+        { asin: 'B001BOOK02', title: 'Book Two', author: 'Author A', narrator: 'Narrator' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    // No dedup (each book is unique)
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A', narrator: 'Narrator' },
+        { asin: 'B001BOOK02', title: 'Book Two', author: 'Author A', narrator: 'Narrator' },
+      ],
+      groups: [],
+    });
+
+    // Both requests succeed
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    expect(stats.seriesChecked).toBe(1);
+    expect(stats.requestsCreated).toBe(2);
+    expect(mockCreateRequestForUser).toHaveBeenCalledTimes(2);
+    expect(prismaMock.watchedSeries.update).toHaveBeenCalledWith({
+      where: { id: 'ws-1' },
+      data: { lastCheckedAt: expect.any(Date) },
+    });
+  });
+
+  it('skips books already in the library', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Test Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Test Series',
+      bookCount: 2,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+        { asin: 'B001BOOK02', title: 'Book Two', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+        { asin: 'B001BOOK02', title: 'Book Two', author: 'Author A' },
+      ],
+      groups: [],
+    });
+
+    // Book One is already in library
+    prismaMock.plexLibrary.findMany.mockResolvedValue([
+      { asin: 'B001BOOK01' },
+    ]);
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    expect(stats.skippedOwned).toBe(1);
+    expect(stats.requestsCreated).toBe(1);
+    expect(mockCreateRequestForUser).toHaveBeenCalledTimes(1);
+    expect(mockCreateRequestForUser).toHaveBeenCalledWith('user-1', expect.objectContaining({ asin: 'B001BOOK02' }));
+  });
+
+  it('processes watched authors and creates requests', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([
+      {
+        id: 'wa-1',
+        userId: 'user-1',
+        authorAsin: 'B001AUTH001',
+        authorName: 'Author A',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.update.mockResolvedValue({});
+
+    // Author has 1 book
+    mockSearchByAuthorAsin.mockResolvedValueOnce({
+      books: [
+        { asin: 'B001BOOK01', title: 'Author Book', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+      totalResults: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Author Book', author: 'Author A' },
+      ],
+      groups: [],
+    });
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    expect(stats.authorsChecked).toBe(1);
+    expect(stats.requestsCreated).toBe(1);
+    expect(mockSearchByAuthorAsin).toHaveBeenCalledWith('Author A', 'B001AUTH001', 1);
+  });
+
+  it('counts duplicate/already-available books as skippedExisting', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Test Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Test Series',
+      bookCount: 1,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      groups: [],
+    });
+
+    // Request creation returns duplicate
+    mockCreateRequestForUser.mockResolvedValue({
+      success: false,
+      reason: 'duplicate',
+      message: 'Already requested',
+    });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    expect(stats.skippedExisting).toBe(1);
+    expect(stats.requestsCreated).toBe(0);
+  });
+
+  it('deduplicates scraping when multiple users watch same series', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Same Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'user1' },
+      },
+      {
+        id: 'ws-2',
+        userId: 'user-2',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Same Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-2', plexUsername: 'user2' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    // Should only scrape once despite 2 subscriptions
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Same Series',
+      bookCount: 1,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      groups: [],
+    });
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    // Scraped once, but created requests for both users
+    expect(mockScrapeSeriesPage).toHaveBeenCalledTimes(1);
+    expect(mockCreateRequestForUser).toHaveBeenCalledTimes(2);
+    expect(stats.requestsCreated).toBe(2);
+  });
+
+  it('handles empty series page gracefully', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Empty Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+
+    mockScrapeSeriesPage.mockResolvedValueOnce(null);
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    expect(stats.seriesChecked).toBe(1);
+    expect(stats.booksFound).toBe(0);
+    expect(stats.requestsCreated).toBe(0);
+    expect(mockCreateRequestForUser).not.toHaveBeenCalled();
+  });
+
+  it('returns empty stats when no watched items exist', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([]);
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists();
+
+    expect(stats.seriesChecked).toBe(0);
+    expect(stats.authorsChecked).toBe(0);
+    expect(stats.booksFound).toBe(0);
+    expect(stats.requestsCreated).toBe(0);
+    expect(stats.errors).toBe(0);
+  });
+
+  it('persists dedup groups to works table', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Test Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Test Series',
+      bookCount: 2,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+        { asin: 'B001BOOK02', title: 'Book One (Remastered)', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    const dedupGroup = {
+      canonicalAsin: 'B001BOOK01',
+      allAsins: ['B001BOOK01', 'B001BOOK02'],
+      title: 'Book One',
+      author: 'Author A',
+    };
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [{ asin: 'B001BOOK01', title: 'Book One', author: 'Author A' }],
+      groups: [dedupGroup],
+    });
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    await processWatchedLists();
+
+    expect(mockPersistDedupGroups).toHaveBeenCalledWith([dedupGroup]);
+  });
+
+  // ---- Targeted processing tests ----
+
+  it('filters by seriesAsin when provided in options', async () => {
+    // Two series exist, but we only want to process one
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Target Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Target Series',
+      bookCount: 1,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      groups: [],
+    });
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists(undefined, {
+      userId: 'user-1',
+      seriesAsin: 'B001SERIES1',
+    });
+
+    // Should have passed both userId and seriesAsin to the Prisma query
+    expect(prismaMock.watchedSeries.findMany).toHaveBeenCalledWith({
+      where: { userId: 'user-1', seriesAsin: 'B001SERIES1' },
+      include: { user: { select: { id: true, plexUsername: true } } },
+    });
+
+    expect(stats.seriesChecked).toBe(1);
+    expect(stats.requestsCreated).toBe(1);
+  });
+
+  it('filters by authorAsin when provided in options', async () => {
+    prismaMock.watchedSeries.findMany.mockResolvedValue([]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([
+      {
+        id: 'wa-1',
+        userId: 'user-1',
+        authorAsin: 'B001AUTH001',
+        authorName: 'Target Author',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.update.mockResolvedValue({});
+
+    mockSearchByAuthorAsin.mockResolvedValueOnce({
+      books: [
+        { asin: 'B001BOOK01', title: 'Author Book', author: 'Target Author' },
+      ],
+      hasMore: false,
+      page: 1,
+      totalResults: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Author Book', author: 'Target Author' },
+      ],
+      groups: [],
+    });
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists(undefined, {
+      userId: 'user-1',
+      authorAsin: 'B001AUTH001',
+    });
+
+    // Should have passed both userId and authorAsin to the Prisma query
+    expect(prismaMock.watchedAuthor.findMany).toHaveBeenCalledWith({
+      where: { userId: 'user-1', authorAsin: 'B001AUTH001' },
+      include: { user: { select: { id: true, plexUsername: true } } },
+    });
+
+    expect(stats.authorsChecked).toBe(1);
+    expect(stats.requestsCreated).toBe(1);
+  });
+
+  it('skips authors when targeted for a specific series only', async () => {
+    // When seriesAsin is provided but no authorAsin, authors should still be queried
+    // but with no authorAsin filter (only userId), so they run normally.
+    // The key behavior: seriesAsin filter applies to series, not authors.
+    prismaMock.watchedSeries.findMany.mockResolvedValue([
+      {
+        id: 'ws-1',
+        userId: 'user-1',
+        seriesAsin: 'B001SERIES1',
+        seriesTitle: 'Target Series',
+        coverArtUrl: null,
+        lastCheckedAt: null,
+        user: { id: 'user-1', plexUsername: 'testuser' },
+      },
+    ]);
+
+    prismaMock.watchedAuthor.findMany.mockResolvedValue([]);
+    prismaMock.watchedSeries.update.mockResolvedValue({});
+
+    mockScrapeSeriesPage.mockResolvedValueOnce({
+      asin: 'B001SERIES1',
+      title: 'Target Series',
+      bookCount: 1,
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      hasMore: false,
+      page: 1,
+    });
+
+    mockDeduplicateAndCollectGroups.mockReturnValue({
+      books: [
+        { asin: 'B001BOOK01', title: 'Book One', author: 'Author A' },
+      ],
+      groups: [],
+    });
+
+    mockCreateRequestForUser.mockResolvedValue({ success: true, request: {} });
+
+    const { processWatchedLists } = await import('@/lib/services/watched-lists.service');
+    const stats = await processWatchedLists(undefined, {
+      userId: 'user-1',
+      seriesAsin: 'B001SERIES1',
+    });
+
+    // Series should be filtered by seriesAsin
+    expect(prismaMock.watchedSeries.findMany).toHaveBeenCalledWith({
+      where: { userId: 'user-1', seriesAsin: 'B001SERIES1' },
+      include: { user: { select: { id: true, plexUsername: true } } },
+    });
+
+    // Authors query should only filter by userId (no authorAsin filter)
+    expect(prismaMock.watchedAuthor.findMany).toHaveBeenCalledWith({
+      where: { userId: 'user-1' },
+      include: { user: { select: { id: true, plexUsername: true } } },
+    });
+
+    expect(stats.seriesChecked).toBe(1);
+  });
+});

tests/services/works.service.test.ts

@@ -0,0 +1,306 @@
+/**
+ * Component: Works Service Tests
+ * Documentation: documentation/integrations/audible.md
+ */
+
+import { beforeEach, describe, expect, it, vi } from 'vitest';
+import { createPrismaMock } from '../helpers/prisma';
+import type { DedupGroup } from '@/lib/utils/deduplicate-audiobooks';
+
+const prismaMock = createPrismaMock();
+
+vi.mock('@/lib/db', () => ({
+  prisma: prismaMock,
+}));
+
+vi.mock('@/lib/utils/logger', () => ({
+  RMABLogger: {
+    create: () => ({
+      debug: vi.fn(),
+      info: vi.fn(),
+      warn: vi.fn(),
+      error: vi.fn(),
+    }),
+  },
+}));
+
+describe('persistDedupGroups', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.resetModules();
+  });
+
+  it('creates new work + work_asins for a fresh group', async () => {
+    prismaMock.workAsin.findMany.mockResolvedValue([]);
+    prismaMock.work.create.mockResolvedValue({ id: 'work-1' });
+    prismaMock.workAsin.create.mockResolvedValue({});
+    prismaMock.workAsin.updateMany.mockResolvedValue({ count: 0 });
+
+    const { persistDedupGroups } = await import('@/lib/services/works.service');
+
+    const groups: DedupGroup[] = [{
+      canonicalAsin: 'ASIN_A',
+      allAsins: ['ASIN_A', 'ASIN_B'],
+      title: 'Test Book',
+      author: 'Test Author',
+      narrator: 'Test Narrator',
+      durationMinutes: 600,
+    }];
+
+    await persistDedupGroups(groups);
+
+    expect(prismaMock.work.create).toHaveBeenCalledWith({
+      data: { title: 'Test Book', author: 'Test Author' },
+    });
+    expect(prismaMock.workAsin.create).toHaveBeenCalledTimes(2);
+
+    // Canonical ASIN should have narrator, duration, isCanonical=true
+    expect(prismaMock.workAsin.create).toHaveBeenCalledWith({
+      data: expect.objectContaining({
+        workId: 'work-1',
+        asin: 'ASIN_A',
+        narrator: 'Test Narrator',
+        durationMinutes: 600,
+        isCanonical: true,
+        source: 'dedup_auto',
+      }),
+    });
+
+    // Non-canonical ASIN should have isCanonical=false
+    expect(prismaMock.workAsin.create).toHaveBeenCalledWith({
+      data: expect.objectContaining({
+        workId: 'work-1',
+        asin: 'ASIN_B',
+        isCanonical: false,
+        source: 'dedup_auto',
+      }),
+    });
+  });
+
+  it('adds new ASINs to existing work when canonical already exists', async () => {
+    prismaMock.workAsin.findMany.mockResolvedValue([
+      { asin: 'ASIN_A', workId: 'existing-work' },
+    ]);
+    prismaMock.workAsin.create.mockResolvedValue({});
+    prismaMock.workAsin.updateMany.mockResolvedValue({ count: 1 });
+
+    const { persistDedupGroups } = await import('@/lib/services/works.service');
+
+    const groups: DedupGroup[] = [{
+      canonicalAsin: 'ASIN_A',
+      allAsins: ['ASIN_A', 'ASIN_B', 'ASIN_C'],
+      title: 'Test Book',
+      author: 'Test Author',
+      narrator: 'Narrator',
+      durationMinutes: 500,
+    }];
+
+    await persistDedupGroups(groups);
+
+    // Should NOT create a new work
+    expect(prismaMock.work.create).not.toHaveBeenCalled();
+
+    // Should create entries for ASIN_B and ASIN_C only (ASIN_A already exists)
+    expect(prismaMock.workAsin.create).toHaveBeenCalledTimes(2);
+    expect(prismaMock.workAsin.create).toHaveBeenCalledWith({
+      data: expect.objectContaining({
+        workId: 'existing-work',
+        asin: 'ASIN_B',
+      }),
+    });
+    expect(prismaMock.workAsin.create).toHaveBeenCalledWith({
+      data: expect.objectContaining({
+        workId: 'existing-work',
+        asin: 'ASIN_C',
+      }),
+    });
+  });
+
+  it('merges two separate works when dedup groups them together', async () => {
+    // ASIN_A is in work-1, ASIN_B is in work-2
+    prismaMock.workAsin.findMany.mockResolvedValue([
+      { asin: 'ASIN_A', workId: 'work-1' },
+      { asin: 'ASIN_B', workId: 'work-2' },
+    ]);
+    prismaMock.workAsin.updateMany.mockResolvedValue({ count: 1 });
+    prismaMock.work.deleteMany.mockResolvedValue({ count: 1 });
+
+    const { persistDedupGroups } = await import('@/lib/services/works.service');
+
+    const groups: DedupGroup[] = [{
+      canonicalAsin: 'ASIN_A',
+      allAsins: ['ASIN_A', 'ASIN_B'],
+      title: 'Merged Book',
+      author: 'Author',
+    }];
+
+    await persistDedupGroups(groups);
+
+    // Should move work-2 ASINs to work-1
+    expect(prismaMock.workAsin.updateMany).toHaveBeenCalledWith({
+      where: { workId: { in: ['work-2'] } },
+      data: { workId: 'work-1' },
+    });
+
+    // Should delete work-2
+    expect(prismaMock.work.deleteMany).toHaveBeenCalledWith({
+      where: { id: { in: ['work-2'] } },
+    });
+  });
+
+  it('silently catches and logs errors without throwing', async () => {
+    prismaMock.workAsin.findMany.mockRejectedValue(new Error('DB connection failed'));
+
+    const { persistDedupGroups } = await import('@/lib/services/works.service');
+
+    const groups: DedupGroup[] = [{
+      canonicalAsin: 'ASIN_A',
+      allAsins: ['ASIN_A', 'ASIN_B'],
+      title: 'Test',
+      author: 'Auth',
+    }];
+
+    // Should not throw
+    await expect(persistDedupGroups(groups)).resolves.toBeUndefined();
+  });
+});
+
+describe('seedAsin', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.resetModules();
+  });
+
+  it('creates single-ASIN work for new ASIN', async () => {
+    prismaMock.workAsin.findUnique.mockResolvedValue(null);
+    prismaMock.work.create.mockResolvedValue({ id: 'new-work' });
+    prismaMock.workAsin.create.mockResolvedValue({});
+
+    const { seedAsin } = await import('@/lib/services/works.service');
+
+    await seedAsin('NEW_ASIN', 'New Book', 'Author', 'Narrator', 300);
+
+    expect(prismaMock.work.create).toHaveBeenCalledWith({
+      data: { title: 'New Book', author: 'Author' },
+    });
+    expect(prismaMock.workAsin.create).toHaveBeenCalledWith({
+      data: {
+        workId: 'new-work',
+        asin: 'NEW_ASIN',
+        narrator: 'Narrator',
+        durationMinutes: 300,
+        isCanonical: true,
+        source: 'dedup_auto',
+      },
+    });
+  });
+
+  it('does nothing for already-tracked ASIN', async () => {
+    prismaMock.workAsin.findUnique.mockResolvedValue({
+      id: 'existing',
+      asin: 'EXISTING_ASIN',
+      workId: 'work-1',
+    });
+
+    const { seedAsin } = await import('@/lib/services/works.service');
+
+    await seedAsin('EXISTING_ASIN', 'Book', 'Author');
+
+    expect(prismaMock.work.create).not.toHaveBeenCalled();
+    expect(prismaMock.workAsin.create).not.toHaveBeenCalled();
+  });
+
+  it('silently catches and logs errors without throwing', async () => {
+    prismaMock.workAsin.findUnique.mockRejectedValue(new Error('DB error'));
+
+    const { seedAsin } = await import('@/lib/services/works.service');
+
+    await expect(seedAsin('ASIN', 'Book', 'Auth')).resolves.toBeUndefined();
+  });
+});
+
+describe('getSiblingAsins', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+    vi.resetModules();
+  });
+
+  it('returns sibling ASINs correctly', async () => {
+    // First query: find input ASINs and their work IDs
+    prismaMock.workAsin.findMany
+      .mockResolvedValueOnce([
+        { asin: 'ASIN_A', workId: 'work-1' },
+        { asin: 'ASIN_C', workId: 'work-2' },
+      ])
+      // Second query: all ASINs in those works
+      .mockResolvedValueOnce([
+        { asin: 'ASIN_A', workId: 'work-1' },
+        { asin: 'ASIN_B', workId: 'work-1' },
+        { asin: 'ASIN_C', workId: 'work-2' },
+        { asin: 'ASIN_D', workId: 'work-2' },
+        { asin: 'ASIN_E', workId: 'work-2' },
+      ]);
+
+    const { getSiblingAsins } = await import('@/lib/services/works.service');
+
+    const result = await getSiblingAsins(['ASIN_A', 'ASIN_C']);
+
+    expect(result.get('ASIN_A')).toEqual(['ASIN_B']);
+    expect(result.get('ASIN_C')).toEqual(['ASIN_D', 'ASIN_E']);
+  });
+
+  it('returns empty map for unknown ASINs', async () => {
+    prismaMock.workAsin.findMany.mockResolvedValue([]);
+
+    const { getSiblingAsins } = await import('@/lib/services/works.service');
+
+    const result = await getSiblingAsins(['UNKNOWN']);
+
+    expect(result.size).toBe(0);
+  });
+
+  it('returns empty map for empty input', async () => {
+    const { getSiblingAsins } = await import('@/lib/services/works.service');
+
+    const result = await getSiblingAsins([]);
+
+    expect(result.size).toBe(0);
+    // Should not query DB
+    expect(prismaMock.workAsin.findMany).not.toHaveBeenCalled();
+  });
+
+  it('excludes the input ASIN itself from siblings', async () => {
+    prismaMock.workAsin.findMany
+      .mockResolvedValueOnce([
+        { asin: 'ASIN_A', workId: 'work-1' },
+      ])
+      .mockResolvedValueOnce([
+        { asin: 'ASIN_A', workId: 'work-1' },
+        { asin: 'ASIN_B', workId: 'work-1' },
+      ]);
+
+    const { getSiblingAsins } = await import('@/lib/services/works.service');
+
+    const result = await getSiblingAsins(['ASIN_A']);
+
+    expect(result.get('ASIN_A')).toEqual(['ASIN_B']);
+    expect(result.get('ASIN_A')).not.toContain('ASIN_A');
+  });
+
+  it('omits ASINs with no siblings (single-ASIN works)', async () => {
+    prismaMock.workAsin.findMany
+      .mockResolvedValueOnce([
+        { asin: 'ASIN_LONELY', workId: 'work-solo' },
+      ])
+      .mockResolvedValueOnce([
+        { asin: 'ASIN_LONELY', workId: 'work-solo' },
+      ]);
+
+    const { getSiblingAsins } = await import('@/lib/services/works.service');
+
+    const result = await getSiblingAsins(['ASIN_LONELY']);
+
+    // No siblings means it shouldn't be in the map at all
+    expect(result.has('ASIN_LONELY')).toBe(false);
+  });
+});

tests/utils/deduplicate-audiobooks.test.ts

@@ -0,0 +1,451 @@
+/**
+ * Component: Audiobook Deduplication Tests
+ * Documentation: documentation/integrations/audible.md
+ */
+
+import { describe, expect, it } from 'vitest';
+import {
+  deduplicateAudiobooks,
+  deduplicateAndCollectGroups,
+  normalizeTitle,
+  areDurationsCompatible,
+} from '@/lib/utils/deduplicate-audiobooks';
+import type { AudibleAudiobook } from '@/lib/integrations/audible.service';
+
+// ---------------------------------------------------------------------------
+// Helper: minimal AudibleAudiobook factory
+// ---------------------------------------------------------------------------
+
+function makeBook(overrides: Partial<AudibleAudiobook> & { asin: string; title: string; author: string }): AudibleAudiobook {
+  return {
+    narrator: undefined,
+    coverArtUrl: undefined,
+    durationMinutes: undefined,
+    rating: undefined,
+    description: undefined,
+    releaseDate: undefined,
+    genres: undefined,
+    series: undefined,
+    seriesPart: undefined,
+    seriesAsin: undefined,
+    authorAsin: undefined,
+    ...overrides,
+  };
+}
+
+// ---------------------------------------------------------------------------
+// normalizeTitle
+// ---------------------------------------------------------------------------
+
+describe('normalizeTitle', () => {
+  it('lowercases', () => {
+    expect(normalizeTitle('The Black Prism')).toBe('the black prism');
+  });
+
+  it('strips (Unabridged)', () => {
+    expect(normalizeTitle('The Black Prism (Unabridged)')).toBe('the black prism');
+  });
+
+  it('strips [Abridged Edition]', () => {
+    expect(normalizeTitle('The Black Prism [Abridged Edition]')).toBe('the black prism');
+  });
+
+  it('strips (2024 Remastered Edition)', () => {
+    expect(normalizeTitle('The Hobbit (2024 Remastered Edition)')).toBe('the hobbit');
+  });
+
+  it('strips subtitle after colon', () => {
+    expect(normalizeTitle('The Black Prism: Lightbringer, Book 1')).toBe('the black prism');
+  });
+
+  it('strips subtitle after long dash', () => {
+    expect(normalizeTitle('The Black Prism \u2014 A Lightbringer Novel')).toBe('the black prism');
+  });
+
+  it('strips trailing "A Novel"', () => {
+    expect(normalizeTitle('The Black Prism: A Novel')).toBe('the black prism');
+  });
+
+  it('strips (Audiobook)', () => {
+    expect(normalizeTitle('The Hobbit (Audiobook)')).toBe('the hobbit');
+  });
+
+  it('strips (Dramatized Adaptation)', () => {
+    expect(normalizeTitle('The Black Prism (Dramatized Adaptation)')).toBe('the black prism');
+  });
+
+  it('strips (Full Cast Narration)', () => {
+    expect(normalizeTitle('The Black Prism (Full Cast Narration)')).toBe('the black prism');
+  });
+
+  it('collapses whitespace', () => {
+    expect(normalizeTitle('  The   Black   Prism  ')).toBe('the black prism');
+  });
+
+  it('handles empty string', () => {
+    expect(normalizeTitle('')).toBe('');
+  });
+
+  it('preserves hyphenated words (not subtitles)', () => {
+    // "well-known" has a short dash, not a subtitle separator
+    expect(normalizeTitle('A Well-Known Book')).toBe('a well-known book');
+  });
+});
+
+// ---------------------------------------------------------------------------
+// areDurationsCompatible
+// ---------------------------------------------------------------------------
+
+describe('areDurationsCompatible', () => {
+  it('returns true when both undefined', () => {
+    expect(areDurationsCompatible(undefined, undefined)).toBe(true);
+  });
+
+  it('returns true when one undefined', () => {
+    expect(areDurationsCompatible(600, undefined)).toBe(true);
+    expect(areDurationsCompatible(undefined, 600)).toBe(true);
+  });
+
+  it('returns true for identical durations', () => {
+    expect(areDurationsCompatible(600, 600)).toBe(true);
+  });
+
+  it('uses 1% of longer duration as tolerance for long books', () => {
+    // Two 40-hour books (2400 min): tolerance = max(2400*0.01, 5) = 24 min
+    expect(areDurationsCompatible(2400, 2424)).toBe(true);  // exactly at tolerance
+    expect(areDurationsCompatible(2400, 2425)).toBe(false); // just over
+  });
+
+  it('uses 5-minute minimum tolerance for short books', () => {
+    // Two 2-hour books (120 min): tolerance = max(120*0.01, 5) = max(1.2, 5) = 5 min
+    expect(areDurationsCompatible(120, 125)).toBe(true);  // exactly at 5-min minimum
+    expect(areDurationsCompatible(120, 126)).toBe(false); // just over
+  });
+
+  it('keeps abridged vs unabridged separate (large duration gap)', () => {
+    // Unabridged: 720 min (12 hrs), Abridged: 360 min (6 hrs)
+    expect(areDurationsCompatible(720, 360)).toBe(false);
+  });
+
+  it('symmetry: order does not matter', () => {
+    expect(areDurationsCompatible(2400, 2424)).toBe(true);
+    expect(areDurationsCompatible(2424, 2400)).toBe(true);
+    expect(areDurationsCompatible(120, 126)).toBe(false);
+    expect(areDurationsCompatible(126, 120)).toBe(false);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// deduplicateAudiobooks
+// ---------------------------------------------------------------------------
+
+describe('deduplicateAudiobooks', () => {
+  it('returns empty array for empty input', () => {
+    expect(deduplicateAudiobooks([])).toEqual([]);
+  });
+
+  it('returns single book unchanged', () => {
+    const book = makeBook({ asin: 'A1', title: 'Book One', author: 'Author' });
+    expect(deduplicateAudiobooks([book])).toEqual([book]);
+  });
+
+  it('passes through all-unique books unchanged', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Book One', author: 'Auth', narrator: 'Nar A', durationMinutes: 600 }),
+      makeBook({ asin: 'A2', title: 'Book Two', author: 'Auth', narrator: 'Nar A', durationMinutes: 500 }),
+      makeBook({ asin: 'A3', title: 'Book Three', author: 'Auth', narrator: 'Nar B', durationMinutes: 700 }),
+    ];
+    expect(deduplicateAudiobooks(books)).toHaveLength(3);
+  });
+
+  it('collapses simple duplicates (same title + narrator + similar duration)', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1260 }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1262 }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(1);
+  });
+
+  it('keeps books with different narrators (different production)', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1260 }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Full Cast', durationMinutes: 480 }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(2);
+  });
+
+  it('keeps abridged vs unabridged (same narrator, very different duration)', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Hobbit', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 660 }),
+      makeBook({ asin: 'A2', title: 'The Hobbit', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 330 }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(2);
+  });
+
+  it('collapses when one book has missing duration', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1260 }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: undefined }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(1);
+  });
+
+  it('collapses when both books have missing duration', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance' }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance' }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(1);
+  });
+
+  it('collapses title variants with edition markers', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism (Unabridged)', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1260 }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1258 }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(1);
+  });
+
+  it('collapses title variants with subtitles', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism: Lightbringer, Book 1', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1260 }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1262 }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(1);
+  });
+
+  it('picks the representative with most metadata', () => {
+    const sparse = makeBook({
+      asin: 'A1', title: 'The Black Prism', author: 'Brent Weeks',
+      narrator: 'Simon Vance', durationMinutes: 1260,
+    });
+    const rich = makeBook({
+      asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks',
+      narrator: 'Simon Vance', durationMinutes: 1262,
+      coverArtUrl: 'https://img.jpg', rating: 4.5, description: 'Great book',
+    });
+    const result = deduplicateAudiobooks([sparse, rich]);
+    expect(result).toHaveLength(1);
+    expect(result[0].asin).toBe('A2'); // rich entry wins
+  });
+
+  it('preserves original order (first-seen position)', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Alpha', author: 'Auth', narrator: 'Nar', durationMinutes: 300 }),
+      makeBook({ asin: 'B1', title: 'Beta', author: 'Auth', narrator: 'Nar', durationMinutes: 400 }),
+      makeBook({ asin: 'A2', title: 'Alpha', author: 'Auth', narrator: 'Nar', durationMinutes: 302 }),
+      makeBook({ asin: 'C1', title: 'Charlie', author: 'Auth', narrator: 'Nar', durationMinutes: 500 }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(3);
+    expect(result.map(b => b.title)).toEqual(['Alpha', 'Beta', 'Charlie']);
+  });
+
+  it('handles Lightbringer-style scenario: unabridged + dramatized', () => {
+    // Simon Vance full narration (long)
+    const vance1 = makeBook({
+      asin: 'SV1', title: 'The Black Prism', author: 'Brent Weeks',
+      narrator: 'Simon Vance', durationMinutes: 1260,
+      coverArtUrl: 'cover1.jpg', rating: 4.7,
+    });
+    // Re-listed Simon Vance (same duration, different ASIN)
+    const vance2 = makeBook({
+      asin: 'SV2', title: 'The Black Prism: Lightbringer Book 1', author: 'Brent Weeks',
+      narrator: 'Simon Vance', durationMinutes: 1262,
+    });
+    // Dramatized with full cast (shorter, different narrator)
+    const drama = makeBook({
+      asin: 'DR1', title: 'The Black Prism (Dramatized Adaptation)', author: 'Brent Weeks',
+      narrator: 'Full Cast', durationMinutes: 480,
+      coverArtUrl: 'cover-drama.jpg',
+    });
+
+    const result = deduplicateAudiobooks([vance1, vance2, drama]);
+    expect(result).toHaveLength(2);
+    // Simon Vance should collapse to 1, Full Cast stays
+    expect(result.find(b => b.narrator === 'Simon Vance')).toBeTruthy();
+    expect(result.find(b => b.narrator === 'Full Cast')).toBeTruthy();
+    // Should pick the richer entry for Simon Vance
+    const svResult = result.find(b => b.narrator === 'Simon Vance')!;
+    expect(svResult.asin).toBe('SV1'); // has cover + rating
+  });
+
+  it('uses percentage tolerance for very long audiobooks', () => {
+    // Two 40-hour books: tolerance = max(2400*0.01, 5) = 24 min
+    const books = [
+      makeBook({ asin: 'A1', title: 'Long Book', author: 'Auth', narrator: 'Nar', durationMinutes: 2400 }),
+      makeBook({ asin: 'A2', title: 'Long Book', author: 'Auth', narrator: 'Nar', durationMinutes: 2420 }),
+    ];
+    expect(deduplicateAudiobooks(books)).toHaveLength(1);
+
+    // Beyond tolerance
+    const booksFar = [
+      makeBook({ asin: 'A1', title: 'Long Book', author: 'Auth', narrator: 'Nar', durationMinutes: 2400 }),
+      makeBook({ asin: 'A2', title: 'Long Book', author: 'Auth', narrator: 'Nar', durationMinutes: 2430 }),
+    ];
+    expect(deduplicateAudiobooks(booksFar)).toHaveLength(2);
+  });
+
+  it('treats missing narrator as its own group', () => {
+    // Two entries with same title but no narrator - should collapse
+    const books = [
+      makeBook({ asin: 'A1', title: 'Test Book', author: 'Auth', narrator: undefined, durationMinutes: 300 }),
+      makeBook({ asin: 'A2', title: 'Test Book', author: 'Auth', narrator: undefined, durationMinutes: 302 }),
+    ];
+    expect(deduplicateAudiobooks(books)).toHaveLength(1);
+  });
+
+  it('does not collapse empty-narrator with named narrator', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Test Book', author: 'Auth', narrator: undefined, durationMinutes: 300 }),
+      makeBook({ asin: 'A2', title: 'Test Book', author: 'Auth', narrator: 'John Smith', durationMinutes: 302 }),
+    ];
+    expect(deduplicateAudiobooks(books)).toHaveLength(2);
+  });
+
+  it('collapses duplicates when narrators are listed in different order', () => {
+    const books = [
+      makeBook({
+        asin: 'A1', title: 'The Passengers', author: 'John Marrs',
+        narrator: 'Kristin Atherton, Roy McMillan, Clare Corbett, Tom Bateman, Patience Tomlinson, Shaheen Khan',
+        durationMinutes: 600,
+      }),
+      makeBook({
+        asin: 'A2', title: 'The Passengers', author: 'John Marrs',
+        narrator: 'Clare Corbett, Roy McMillan, Tom Bateman, Shaheen Khan, Kristin Atherton, Patience Tomlinson',
+        durationMinutes: 602,
+      }),
+    ];
+    const result = deduplicateAudiobooks(books);
+    expect(result).toHaveLength(1);
+  });
+});
+
+// ---------------------------------------------------------------------------
+// deduplicateAndCollectGroups
+// ---------------------------------------------------------------------------
+
+describe('deduplicateAndCollectGroups', () => {
+  it('returns empty groups array when no duplicates', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Book One', author: 'Auth', narrator: 'Nar A', durationMinutes: 600 }),
+      makeBook({ asin: 'A2', title: 'Book Two', author: 'Auth', narrator: 'Nar A', durationMinutes: 500 }),
+    ];
+    const { books: result, groups } = deduplicateAndCollectGroups(books);
+    expect(result).toHaveLength(2);
+    expect(groups).toHaveLength(0);
+  });
+
+  it('returns empty groups for empty input', () => {
+    const { books: result, groups } = deduplicateAndCollectGroups([]);
+    expect(result).toHaveLength(0);
+    expect(groups).toHaveLength(0);
+  });
+
+  it('returns empty groups for single book', () => {
+    const book = makeBook({ asin: 'A1', title: 'Book One', author: 'Auth' });
+    const { books: result, groups } = deduplicateAndCollectGroups([book]);
+    expect(result).toHaveLength(1);
+    expect(groups).toHaveLength(0);
+  });
+
+  it('returns group with 2 ASINs when 2 books match', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1260 }),
+      makeBook({ asin: 'A2', title: 'The Black Prism', author: 'Brent Weeks', narrator: 'Simon Vance', durationMinutes: 1262 }),
+    ];
+    const { books: result, groups } = deduplicateAndCollectGroups(books);
+    expect(result).toHaveLength(1);
+    expect(groups).toHaveLength(1);
+    expect(groups[0].allAsins).toHaveLength(2);
+    expect(groups[0].allAsins).toContain('A1');
+    expect(groups[0].allAsins).toContain('A2');
+  });
+
+  it('returns group with 3+ ASINs for multi-duplicate scenario', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Hobbit', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 660 }),
+      makeBook({ asin: 'A2', title: 'The Hobbit', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 662 }),
+      makeBook({ asin: 'A3', title: 'The Hobbit (Unabridged)', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 658 }),
+    ];
+    const { books: result, groups } = deduplicateAndCollectGroups(books);
+    expect(result).toHaveLength(1);
+    expect(groups).toHaveLength(1);
+    expect(groups[0].allAsins).toHaveLength(3);
+    expect(groups[0].allAsins).toContain('A1');
+    expect(groups[0].allAsins).toContain('A2');
+    expect(groups[0].allAsins).toContain('A3');
+  });
+
+  it('canonicalAsin is the one with highest metadata score', () => {
+    const sparse = makeBook({
+      asin: 'SPARSE', title: 'The Black Prism', author: 'Brent Weeks',
+      narrator: 'Simon Vance', durationMinutes: 1260,
+    });
+    const rich = makeBook({
+      asin: 'RICH', title: 'The Black Prism', author: 'Brent Weeks',
+      narrator: 'Simon Vance', durationMinutes: 1262,
+      coverArtUrl: 'https://img.jpg', rating: 4.5, description: 'Great book',
+    });
+    const { groups } = deduplicateAndCollectGroups([sparse, rich]);
+    expect(groups).toHaveLength(1);
+    expect(groups[0].canonicalAsin).toBe('RICH');
+  });
+
+  it('groups only include entries with 2+ ASINs', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Alpha', author: 'Auth', narrator: 'Nar', durationMinutes: 300 }),
+      makeBook({ asin: 'A2', title: 'Alpha', author: 'Auth', narrator: 'Nar', durationMinutes: 302 }),
+      makeBook({ asin: 'B1', title: 'Beta', author: 'Auth', narrator: 'Nar', durationMinutes: 500 }),
+    ];
+    const { groups } = deduplicateAndCollectGroups(books);
+    // Only Alpha group should appear (Beta is a singleton)
+    expect(groups).toHaveLength(1);
+    expect(groups[0].allAsins).toContain('A1');
+    expect(groups[0].allAsins).toContain('A2');
+  });
+
+  it('duration-incompatible books produce separate entries (no group for singletons)', () => {
+    // Same title/narrator but very different durations (abridged vs unabridged)
+    const books = [
+      makeBook({ asin: 'A1', title: 'The Hobbit', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 660 }),
+      makeBook({ asin: 'A2', title: 'The Hobbit', author: 'Tolkien', narrator: 'Andy Serkis', durationMinutes: 330 }),
+    ];
+    const { books: result, groups } = deduplicateAndCollectGroups(books);
+    expect(result).toHaveLength(2); // Not collapsed
+    expect(groups).toHaveLength(0); // No multi-ASIN groups
+  });
+
+  it('books field matches what deduplicateAudiobooks returns', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Alpha', author: 'Auth', narrator: 'Nar', durationMinutes: 300, coverArtUrl: 'img.jpg', rating: 4.5 }),
+      makeBook({ asin: 'A2', title: 'Alpha', author: 'Auth', narrator: 'Nar', durationMinutes: 302 }),
+      makeBook({ asin: 'B1', title: 'Beta', author: 'Auth', narrator: 'Nar', durationMinutes: 500 }),
+      makeBook({ asin: 'C1', title: 'Charlie', author: 'Auth', narrator: 'Nar', durationMinutes: 600 }),
+      makeBook({ asin: 'C2', title: 'Charlie', author: 'Auth', narrator: 'Nar', durationMinutes: 601 }),
+    ];
+    const dedupOnly = deduplicateAudiobooks(books);
+    const { books: withGroups } = deduplicateAndCollectGroups(books);
+    expect(withGroups.map(b => b.asin)).toEqual(dedupOnly.map(b => b.asin));
+  });
+
+  it('includes narrator and durationMinutes from canonical entry in group', () => {
+    const books = [
+      makeBook({ asin: 'A1', title: 'Test Book', author: 'Auth', narrator: 'Jane Doe', durationMinutes: 480 }),
+      makeBook({ asin: 'A2', title: 'Test Book', author: 'Auth', narrator: 'Jane Doe', durationMinutes: 482, coverArtUrl: 'img.jpg', rating: 4.0 }),
+    ];
+    const { groups } = deduplicateAndCollectGroups(books);
+    expect(groups).toHaveLength(1);
+    expect(groups[0].canonicalAsin).toBe('A2'); // richer metadata
+    expect(groups[0].narrator).toBe('Jane Doe');
+    expect(groups[0].durationMinutes).toBe(482);
+    expect(groups[0].author).toBe('Auth');
+  });
+});