diff --git a/src/app/services/book_library.py b/src/app/services/book_library.py
index 1da9c77..4770dd2 100644
--- a/src/app/services/book_library.py
+++ b/src/app/services/book_library.py
@@ -38,6 +38,10 @@ class Book(BaseModel):
     authors: list[BookAuthor]
 
 
+class BookDetail(Book):
+    remote_id: int
+
+
 class BookLibraryClient:
     API_KEY = env_config.BOOK_LIBRARY_API_KEY
     BASE_URL = env_config.BOOK_LIBRARY_URL
@@ -61,6 +65,12 @@ class BookLibraryClient:
 
         return [Source.parse_obj(item) for item in page.items]
 
+    @classmethod
+    async def get_book(cls, book_id: int) -> BookDetail:
+        data = await cls._make_request(f"{cls.BASE_URL}/api/v1/books/{book_id}")
+
+        return BookDetail.parse_obj(data)
+
     @classmethod
     async def get_remote_book(cls, source_id: int, book_id: int) -> Book:
         data = await cls._make_request(
diff --git a/src/app/views.py b/src/app/views.py
index d8e623b..865fc21 100644
--- a/src/app/views.py
+++ b/src/app/views.py
@@ -1,8 +1,9 @@
-from fastapi import APIRouter, Depends
-from fastapi.responses import Response
+from fastapi import APIRouter, Depends, Response
 
 from app.depends import check_token
+from app.services.book_library import BookLibraryClient
 from app.services.dowloaders_manager import DownloadersManager
+from app.services.utils import get_filename as _get_filename
 
 
 router = APIRouter(
@@ -20,3 +21,10 @@ async def download(source_id: int, remote_id: int, file_type: str):
     return Response(
         content, headers={"Content-Disposition": f"attachment; filename={filename}"}
     )
+
+
+@router.get("/filename/{book_id}/{file_type}", response_model=str)
+async def get_filename(book_id: int, file_type: str):
+    book = await BookLibraryClient.get_book(book_id)
+
+    return _get_filename(book.remote_id, book, file_type)