The television anime adaptation of Mikami En’s Biblia Koshodou no Jiken Techou (The Case Files of Biblia Bookstore) novel will premiere in April 2027. The news came during Saturday’s Dengeki Bunko Autumn Festival Online 2026 livestream, which also brought additional cast members, more staff credits, and the first promotional video.
Cast
| Character | Voice Actor | Previously Known For |
|---|---|---|
| Shinokawa Fumika | Osanai Reo | Tefuda ga Oome no Victoria |
| Shinokawa Fumika | Takagi Wataru | Kirio Fanclub |
| Kasai Kikuya | Azakami Youhei | Akane-banashi |
| Kosuge Nao | Kamijou Saeko | Gekai Elise |
Staff
| Position | Staff | Previously Known For |
|---|---|---|
| Assistant Director | Matsui Kento | Spy x Family (episode director) |
| Prop Design | Fukuyo Manami | Atarashii Joushi wa Do Tennen (animation director) |
| Art Director | Kai Masatoshi | Gimai Seikatsu |
| Art Setting | Shiozawa Yoshinori | Kaoru Hana wa Rin to Saku (art design) |
| Color Design | Nakashima Kazuko | Nige Jouzu no Wakagimi |
| Director of Photography | Kawase Teruyuki | Buddy Daddies |
| Photography Supervisor | Shiokawa Tomoyuki | Seihantai na Kimi to Boku (director of photography) |
| CG Director | Ito Tatsuhiro | — |
| Editing | Matsubara Rie | Ninja to Koroshiya no Futarigurashi |
| Sound Director | Yaginuma Tomohiko | Shoushimin Series 2nd Season |
| Sound Effects | Yaso Shouta | Koori no Jouheki |
Main Staff and Production
Kanbe Mamoru (Shoushimin Series) is directing the anime at CloverWorks, with Kurata Ayako (Granblue Fantasy The Animation anime series director) serving as assistant director. Oono Toshiya (86) is handling the series composition, Nakai Jun (NieR:Automata Ver1.1a) is designing the characters, and Obata Takahiro (Yakusoku no Neverland) is composing the music.
Novel and Manga Background
Mikami launched the mystery drama novel with illustrations by Koshijima Hagu under the Media Works Bunko label in March 2011. Kadokawa, formerly known as ASCII Media Works, released the 12th volume on April 24.
The series has also inspired three manga adaptations:
- Nakano started the first adaptation in Altima Ace in February 2012. It later moved to Monthly Asuka in December 2012 and concluded in July 2014, with Kadokawa publishing the sixth and final volume in September that year.
- Kouda Ryou serialized a second adaptation in good! Afternoon from July 2012 to September 2013. Kodansha published the third and final volume in January 2014.
- Niwa Haruki began adapting the tenth novel volume, subtitled Tobirako to Utsuro na Yume, in Young Ace UP! in February 2024. Kadokawa published the third volume in November 2025.
Live-Action Drama
A live-action drama adaptation aired on Fuji TV across 11 episodes from January to March 2013.
Source: Dengeki Online
