unable to identify books

Description of the bug

on version 12.0 and 12.1 i have added a couple books in the epub format to a ebooks library. jellyfin was unable to identify the book so its just listed as a the file name with no metadata or cover art. i can find then book manually on google books but when i put in the id or the isbn id it showes no results. if i try to identify by name all i get is comic vine results which are not accurate as they are cookbooks and not comics

Reproduction steps

1. sign into jellyfin
2. navigate to books library
3. click 3 dots on book in question and click identify 4a enter name and click search 4b enter google books OR isbn id and click search

What is the current bug behavior?

results are empty or give only comics suggestions to a non-comic book

What is the expected correct behavior?

to display results for multiple books with similar titles to pick from or to autoatically identify the books themselves

Jellyfin Server version

12.1

Specify commit id

No response

Specify unstable release number

No response

Specify version number

No response

Specify the build version

12.1

Environment

- OS: windows 11 pro
- Linux Kernel:none
- Virtualization:windows server app
- Clients:browser, jellyfin media player for windows
- Browser:thorium 138
- FFmpeg Version:
- Playback Method:direct play
- Hardware Acceleration:nvenc
- CPU Model: i7-13700kf
- GPU Model:rtx 3060 12gb
- Plugins:audiodb, comic vine, file transformation, google books, intro skiupper, jellynext, jellytag, listenbrainz, music brainz,omdb, open subtitles, studio images, tmdb, trickplay folder cleaner
- Reverse Proxy:none
- Base URL:none
- Networking:host
- Jellyfin Data Storage & Filesystem: local nvme ssd
- Media Storage & Filesystem: local hdd raid
- External Integrations:

Jellyfin logs

[2026-09-17 07:32:02.454 -06:00] [INF] [40] Emby.Server.Implementations.Session.SessionManager: User "Netto" stopped playback of '"Pillsbury_ One-Dish Meals Cookbook_ More - Pillsbury Company"' at "0"ms ("Jellyfin Web" "12.1.0")
[2026-09-17 07:32:09.943 -06:00] [ERR] [50] Jellyfin.Plugin.GoogleBooks.Providers.GoogleBooksProvider: Error response from Google Books API: "" (status code: TooManyRequests)
[2026-09-17 07:36:21.331 -06:00] [INF] [44] Emby.Server.Implementations.HttpServer.WebSocketManager: WS "127.0.0.1" closed
[2026-09-17 07:36:58.317 -06:00] [ERR] [47] Jellyfin.Plugin.GoogleBooks.Providers.GoogleBooksProvider: Error response from Google Books API: "" (status code: TooManyRequests)
[2026-09-17 07:38:42.238 -06:00] [ERR] [57] Jellyfin.Plugin.GoogleBooks.Providers.GoogleBooksProvider: Error response from Google Books API: "" (status code: TooManyRequests)
[2026-09-17 07:38:43.725 -06:00] [ERR] [57] Jellyfin.Plugin.ComicVine.Providers.ComicVineMetadataProvider: Comic Vine API response received with error code 101 : "Object Not Found"
[2026-09-17 07:39:15.678 -06:00] [ERR] [34] Jellyfin.Plugin.GoogleBooks.Providers.GoogleBooksProvider: Error response from Google Books API: "" (status code: TooManyRequests)
[2026-09-17 07:39:15.834 -06:00] [ERR] [34] Jellyfin.Plugin.ComicVine.Providers.ComicVineMetadataProvider: Comic Vine API response received with error code 101 : "Object Not Found"
[2026-09-17 07:46:12.124 -06:00] [WRN] [71] Jellyfin.Drawing.Skia.SkiaEncoder: Unable to determine image dimensions for "H:\Media\TV Showes\Though I Am an Inept Villainess\Season 1\Though I Am an Inept Villainess S01E09 I Will Make Sure To Save You 1080p NF WEB-DL DUAL AAC2.0 H.264-VARYG (Futsutsuka na Akujo de wa Gozaimasu ga - Suuguu Chouso Torikae Den, Dual-Audio, Multi-Subs)-thumb.jpg": InternalError
[2026-09-17 07:46:12.173 -06:00] [WRN] [71] Jellyfin.Drawing.Skia.SkiaEncoder: Unable to determine image dimensions for "H:\Media\TV Showes\From Old Country Bumpkin to Master Swordsman\Season 2\From Old Country Bumpkin to Master Swordsman S02E11 The Old Country Bumpkin Flies into a Rage 1080p AMZN WEB-DL DUAL DDP2.0 H.264-VARYG (Katainaka no Ossan, Kensei ni Naru II, Dual-Audio, Multi-Subs)-thumb.jpg": InternalError
[2026-09-17 07:46:12.176 -06:00] [WRN] [71] Jellyfin.Drawing.Skia.SkiaEncoder: Unable to determine image dimensions for "H:\Media\TV Showes\Re - ZERO, Starting Life in Another World\Season 4\Re ZERO Starting Life in Another World S04E15 A Single-Minded Star 1080p CR WEB-DL DUAL AAC2.0 H.264-VARYG (Re-Zero kara Hajimeru Isekai Seikatsu 4th Season, Dual-Audio, Multi-Subs)-thumb.jpg": InternalError
[2026-09-17 07:46:12.586 -06:00] [WRN] [61] Jellyfin.Drawing.Skia.SkiaEncoder: Unable to determine image dimensions for "H:\Media\TV Showes\Ned's Declassified School Survival Guide\Ned's Declassified School Survival Guide (2004) Season 1-3 S01-03 (480p AMZN WEBRIP x265 HEVC 10bit DDP 2.0 EDGE2020)\Season 1\Ned's Declassified School Survival Guide - S01E02 - Guide to Bathrooms & Project Partners (480p x265 EDGE2020)-thumb.jpg": InternalError
[2026-09-17 07:46:23.872 -06:00] [ERR] [35] Jellyfin.Plugin.GoogleBooks.Providers.GoogleBooksProvider: Error response from Google Books API: "" (status code: TooManyRequests)

FFmpeg logs

Client / Browser logs

No response

Relevant screenshots or videos

No response

Additional information

No response