The Case Records of the Biblia Secondhand Bookstore Spin-Off Koguchi-san and My Biblia Fight Club Activity Diary (Volume)

is the first volume of the The Case Records of the Biblia Secondhand Bookstore Spin-Off Koguchi-san and My Biblia Fight Club Activity Diary light novel series, written by Minato Ishikawa and Illustrated by Okada Amitsu. It was released under the Dengeki Bunko Imprint in March 2017.

The series is a spin-off to En Mikami's Biblia Koshodou no Jiken Tenchou published under MediaWorks Bunko.

Synopsis
Kyohei Maekawa, who was secretly reading a novel to his friends at a high school in Kamakura. He also wrote a novel full of Chuunibyo, but one day he lost the notebook that wrote the novel at school. He picked up Koguchi Ushirono, a member of the library. She was a small animal and was a reading girl who got into the world of her work when she was absorbed in reading. The old library is the only place where she can read with peace of mind for Koguchi, who cannot read in a crowded place because she is too enthusiastic. However, the old library, which has few users, is in danger of being abolished, and the two decide to challenge the original rule book review battle "Biblia Fight" to protect the old library. In Biblia Fight, which presents recommended books, we introduce many real masterpieces. A page of youth of high school students who like books, in which Shiori, the original novel, also appears.

(source: Dengeki Bunko Official Website - Translated)