diff --git a/src/hxbooks/library.py b/src/hxbooks/library.py
index 571d6d9..625e423 100644
--- a/src/hxbooks/library.py
+++ b/src/hxbooks/library.py
@@ -5,6 +5,7 @@ Clean service layer for book management, reading tracking, and wishlist operatio
 Separated from web interface concerns to enable both CLI and web access.
 """
 
+import hashlib
 import logging
 from collections import defaultdict
 from collections.abc import Sequence
@@ -1013,32 +1014,27 @@ def download_book_cover(book: Book, image_url: str) -> bool:
                 return False
 
             # Load image directly from file
-            with Image.open(source_path) as image:
-                processed_image = _process_cover_image(image)
-
-                # Generate filename
-                extension = ".jpg"  # Always save as JPEG
-                filename = f"book_{book.id}{extension}"
-                cover_path = covers_dir / filename
-
-                # Save processed image
-                processed_image.save(cover_path, "JPEG", quality=85)
+            source = source_path
         else:
             # Handle HTTP(S) URLs
             response = requests.get(image_url, timeout=10, stream=True)
             response.raise_for_status()
 
             # Load image from response content
-            with Image.open(response.raw) as image:
-                processed_image = _process_cover_image(image)
+            source = response.raw
 
-                # Generate filename
-                extension = ".jpg"  # Always save as JPEG
-                filename = f"book_{book.id}{extension}"
-                cover_path = covers_dir / filename
+        with Image.open(source) as image:
+            processed_image = _process_cover_image(image)
 
-                # Save processed image
-                processed_image.save(cover_path, "JPEG", quality=85)
+            # Generate filename
+            extension = ".jpg"  # Always save as JPEG
+            # Hash the image to create a unique filename based on content
+            image_hash = hashlib.md5(processed_image.tobytes()).hexdigest()
+            filename = f"book_{book.id}_{image_hash}{extension}"
+            cover_path = covers_dir / filename
+
+            # Save processed image
+            processed_image.save(cover_path, "JPEG", quality=85)
 
         # Update book record
         book.cover_image_path = filename