diff --git a/apps/api/src/main.rs b/apps/api/src/main.rs
index e94ad6e..720f4a6 100644
--- a/apps/api/src/main.rs
+++ b/apps/api/src/main.rs
@@ -103,7 +103,7 @@ async fn main() -> anyhow::Result<()> {
         .route("/libraries/:id/reading-status-provider", axum::routing::patch(libraries::update_reading_status_provider))
         .route("/books/:id", axum::routing::patch(books::update_book).delete(books::delete_book))
         .route("/books/:id/convert", axum::routing::post(books::convert_book))
-        .route("/libraries/:library_id/series/:name", axum::routing::patch(series::update_series))
+        .route("/libraries/:library_id/series/:name", axum::routing::patch(series::update_series).delete(series::delete_series))
         .route("/index/rebuild", axum::routing::post(index_jobs::enqueue_rebuild))
         .route("/index/thumbnails/rebuild", axum::routing::post(thumbnails::start_thumbnails_rebuild))
         .route("/index/thumbnails/regenerate", axum::routing::post(thumbnails::start_thumbnails_regenerate))
diff --git a/apps/api/src/series.rs b/apps/api/src/series.rs
index f9395d3..0151aa1 100644
--- a/apps/api/src/series.rs
+++ b/apps/api/src/series.rs
@@ -1076,3 +1076,133 @@ pub async fn update_series(
 
     Ok(Json(UpdateSeriesResponse { updated: result.rows_affected() }))
 }
+
+/// Delete an entire series: removes all books (files + DB), the series folder,
+/// and all related metadata (external links, anilist, available downloads).
+#[utoipa::path(
+    delete,
+    path = "/libraries/{library_id}/series/{name}",
+    tag = "series",
+    params(
+        ("library_id" = String, Path, description = "Library UUID"),
+        ("name" = String, Path, description = "Series name (URL-encoded)"),
+    ),
+    responses(
+        (status = 200, description = "Series deleted"),
+        (status = 404, description = "Series not found"),
+        (status = 401, description = "Unauthorized"),
+    ),
+    security(("Bearer" = []))
+)]
+pub async fn delete_series(
+    State(state): State<AppState>,
+    Extension(user): Extension<AuthUser>,
+    Path((library_id, name)): Path<(Uuid, String)>,
+) -> Result<Json<crate::responses::DeletedResponse>, ApiError> {
+    use stripstream_core::paths::remap_libraries_path;
+
+    // Find all books in this series
+    let book_rows = sqlx::query(
+        "SELECT b.id, b.thumbnail_path, bf.abs_path \
+         FROM books b \
+         LEFT JOIN book_files bf ON bf.book_id = b.id \
+         WHERE b.library_id = $1 AND LOWER(COALESCE(NULLIF(b.series, ''), 'unclassified')) = LOWER($2)",
+    )
+    .bind(library_id)
+    .bind(&name)
+    .fetch_all(&state.pool)
+    .await?;
+
+    if book_rows.is_empty() {
+        return Err(ApiError::not_found("series not found or has no books"));
+    }
+
+    // Collect the series directory from the first book's path
+    let mut series_dir: Option<String> = None;
+
+    // Delete each book's physical file and thumbnail
+    for row in &book_rows {
+        let abs_path: Option<String> = row.get("abs_path");
+        let thumbnail_path: Option<String> = row.get("thumbnail_path");
+
+        if let Some(ref path) = abs_path {
+            let physical = remap_libraries_path(path);
+            if series_dir.is_none() {
+                if let Some(parent) = std::path::Path::new(&physical).parent() {
+                    series_dir = Some(parent.to_string_lossy().into_owned());
+                }
+            }
+            match std::fs::remove_file(&physical) {
+                Ok(()) => {}
+                Err(e) if e.kind() == std::io::ErrorKind::NotFound => {}
+                Err(e) => {
+                    tracing::warn!("[SERIES] Failed to delete file {}: {}", physical, e);
+                }
+            }
+        }
+
+        if let Some(ref path) = thumbnail_path {
+            let _ = std::fs::remove_file(path);
+        }
+    }
+
+    // Delete the series directory if it's now empty (or only has non-book files)
+    if let Some(ref dir) = series_dir {
+        match std::fs::remove_dir_all(dir) {
+            Ok(()) => tracing::info!("[SERIES] Deleted series directory: {}", dir),
+            Err(e) => tracing::warn!("[SERIES] Failed to delete series directory {}: {}", dir, e),
+        }
+    }
+
+    // Delete all books from DB (cascades to book_files, reading_progress, etc.)
+    let book_ids: Vec<Uuid> = book_rows.iter().map(|r| r.get("id")).collect();
+    sqlx::query("DELETE FROM books WHERE id = ANY($1)")
+        .bind(&book_ids)
+        .execute(&state.pool)
+        .await?;
+
+    // Delete series metadata
+    sqlx::query("DELETE FROM series_metadata WHERE library_id = $1 AND name = $2")
+        .bind(library_id)
+        .bind(&name)
+        .execute(&state.pool)
+        .await?;
+
+    // Delete external metadata links (cascades to external_book_metadata)
+    sqlx::query("DELETE FROM external_metadata_links WHERE library_id = $1 AND LOWER(series_name) = LOWER($2)")
+        .bind(library_id)
+        .bind(&name)
+        .execute(&state.pool)
+        .await?;
+
+    // Delete anilist link
+    let _ = sqlx::query("DELETE FROM anilist_series_links WHERE library_id = $1 AND LOWER(series_name) = LOWER($2)")
+        .bind(library_id)
+        .bind(&name)
+        .execute(&state.pool)
+        .await;
+
+    // Delete available downloads
+    let _ = sqlx::query("DELETE FROM available_downloads WHERE library_id = $1 AND LOWER(series_name) = LOWER($2)")
+        .bind(library_id)
+        .bind(&name)
+        .execute(&state.pool)
+        .await;
+
+    // Queue a scan job for consistency
+    let scan_job_id = Uuid::new_v4();
+    sqlx::query(
+        "INSERT INTO index_jobs (id, library_id, type, status) VALUES ($1, $2, 'scan', 'pending')",
+    )
+    .bind(scan_job_id)
+    .bind(library_id)
+    .execute(&state.pool)
+    .await?;
+
+    tracing::info!(
+        "[SERIES] Deleted series '{}' ({} books) from library {}, scan job {} queued",
+        name, book_ids.len(), library_id, scan_job_id
+    );
+
+    Ok(Json(crate::responses::DeletedResponse::new(library_id)))
+}
diff --git a/apps/backoffice/app/(app)/libraries/[id]/series/[name]/page.tsx b/apps/backoffice/app/(app)/libraries/[id]/series/[name]/page.tsx
index c0b87b3..23d030e 100644
--- a/apps/backoffice/app/(app)/libraries/[id]/series/[name]/page.tsx
+++ b/apps/backoffice/app/(app)/libraries/[id]/series/[name]/page.tsx
@@ -21,6 +21,9 @@ const ReadingStatusModal = nextDynamic(
 const ProwlarrSearchModal = nextDynamic(
   () => import("@/app/components/ProwlarrSearchModal").then(m => m.ProwlarrSearchModal)
 );
+const DeleteSeriesButton = nextDynamic(
+  () => import("@/app/components/DeleteSeriesButton").then(m => m.DeleteSeriesButton)
+);
 import { notFound } from "next/navigation";
 import { getServerTranslations } from "@/lib/i18n/server";
 
@@ -262,6 +265,10 @@ export default async function SeriesDetailPage({
               readingStatusProvider={library.reading_status_provider ?? null}
               existingLink={readingStatusLink}
             />
+            <DeleteSeriesButton
+              libraryId={id}
+              seriesName={seriesName}
+            />
           </div>
         </div>
       </div>
diff --git a/apps/backoffice/app/components/DeleteSeriesButton.tsx b/apps/backoffice/app/components/DeleteSeriesButton.tsx
new file mode 100644
index 0000000..8b4d3a9
--- /dev/null
+++ b/apps/backoffice/app/components/DeleteSeriesButton.tsx
@@ -0,0 +1,62 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import { Button, Icon, Modal } from "./ui";
+import { useTranslation } from "@/lib/i18n/context";
+
+export function DeleteSeriesButton({ libraryId, seriesName }: { libraryId: string; seriesName: string }) {
+  const { t } = useTranslation();
+  const router = useRouter();
+  const [showConfirm, setShowConfirm] = useState(false);
+  const [deleting, setDeleting] = useState(false);
+
+  async function handleDelete() {
+    setDeleting(true);
+    setShowConfirm(false);
+    try {
+      const resp = await fetch(
+        `/api/libraries/${libraryId}/series/${encodeURIComponent(seriesName)}`,
+        { method: "DELETE" }
+      );
+      if (resp.ok) {
+        router.push(`/libraries/${libraryId}/series`);
+      }
+    } finally {
+      setDeleting(false);
+    }
+  }
+
+  return (
+    <>
+      <Button
+        variant="destructive"
+        size="sm"
+        onClick={() => setShowConfirm(true)}
+        disabled={deleting}
+      >
+        {deleting ? <Icon name="spinner" size="sm" className="animate-spin" /> : <Icon name="trash" size="sm" />}
+        <span className="ml-1.5">{t("seriesDetail.delete")}</span>
+      </Button>
+
+      <Modal isOpen={showConfirm} onClose={() => setShowConfirm(false)} maxWidth="sm">
+        <div className="p-6">
+          <h3 className="text-lg font-semibold text-foreground mb-2">
+            {t("seriesDetail.delete")}
+          </h3>
+          <p className="text-sm text-muted-foreground">
+            {t("seriesDetail.confirmDelete")}
+          </p>
+        </div>
+        <div className="flex justify-end gap-2 px-6 pb-6">
+          <Button variant="outline" size="sm" onClick={() => setShowConfirm(false)}>
+            {t("common.cancel")}
+          </Button>
+          <Button variant="destructive" size="sm" onClick={handleDelete}>
+            {t("seriesDetail.delete")}
+          </Button>
+        </div>
+      </Modal>
+    </>
+  );
+}
diff --git a/apps/backoffice/lib/i18n/en.ts b/apps/backoffice/lib/i18n/en.ts
index d19c9de..414ea32 100644
--- a/apps/backoffice/lib/i18n/en.ts
+++ b/apps/backoffice/lib/i18n/en.ts
@@ -764,6 +764,8 @@ const en: Record<TranslationKey, string> = {
   "bookDetail.updatedAt": "Updated",
   "bookDetail.delete": "Delete",
   "bookDetail.confirmDelete": "The file will be permanently deleted from disk. This action cannot be undone.",
+  "seriesDetail.delete": "Delete series",
+  "seriesDetail.confirmDelete": "All books and the series folder will be permanently deleted from disk. This action cannot be undone.",
 
   // Book preview
   "bookPreview.preview": "Preview",
diff --git a/apps/backoffice/lib/i18n/fr.ts b/apps/backoffice/lib/i18n/fr.ts
index 1de57fc..f455473 100644
--- a/apps/backoffice/lib/i18n/fr.ts
+++ b/apps/backoffice/lib/i18n/fr.ts
@@ -762,6 +762,8 @@ const fr = {
   "bookDetail.updatedAt": "Mis à jour",
   "bookDetail.delete": "Supprimer",
   "bookDetail.confirmDelete": "Le fichier sera définitivement supprimé du disque. Cette action est irréversible.",
+  "seriesDetail.delete": "Supprimer la série",
+  "seriesDetail.confirmDelete": "Tous les livres et le dossier de la série seront définitivement supprimés du disque. Cette action est irréversible.",
 
   // Book preview
   "bookPreview.preview": "Aperçu",