Dual Award-Winning Mystery Writer Kohei Mamon Releases Paperback Edition of 'We Do Not Collect'

The paperback edition of 'We Do Not Collect' (Bokura wa Kaishu Shinai) by Kohei Mamon, a rising star in the authentic mystery (honkaku mystery) genre, was published by Sogen Suiri Bunko on May 28.

Cover illustration by Kashiwai; Book design by Hirotoshi Taniguchi.

[Synopsis]
On the day of a rare solar eclipse, a female student is found dead in a prestigious university dormitory. The scene, a locked room, suggests suicide. However, could a brilliant student and aspiring novelist truly choose death? Her fellow residents, realizing they never fully understood her, begin an independent investigation into the incident. This volume collects five stories, including 'Lunatic Retriever,' winner of the 19th Mysteries! Newcomer Award.

◇ A Collection Acclaimed Since Its Hardcover Release
'We Do Not Collect' features five stories, including the award-winning 'Lunatic Retriever.' Upon its initial hardcover publication in 2024, the work received high praise for its bold mechanical tricks and delicate psychological portrayals.

◇ A Career Starting in Middle School
Author Kohei Mamon began submitting his work to mystery newcomer awards as early as middle school. In high school, he became a finalist for the 13th Mysteries! Newcomer Award. He continued writing throughout his academic and professional life, eventually winning the 19th Mysteries! Newcomer Award while enrolled in a Master's program at the University of Tokyo. The following year, he gained further attention by being selected for the third term of 'Kappa Two,' a project dedicated to discovering new mystery talent.

◇ Endorsements from Fellow University of Tokyo Alumni Authors

'He demonstrates dual identities through these wins. Whether using a dark, powerful hand or a palette of diverse colors.' — Tatsumi Atsugawa

'The core of the mystery lies in what remains uncollected. A new talent that pierces through the end of reasoning.' — Yuto Ichikawa

'I was repeatedly captivated by the ephemeral yet inevitable fusion of puzzle-solving and human drama.' — Yume Tsujido

◇ Upcoming Release: 'Meeting at the Last Stop' in July
A new short story collection titled 'Meeting at the Last Stop' (Shuchakueki de Machiawase) is scheduled for release this July under the 'Mystery Frontier' label. It will include five stories, including the highly discussed 'Yumeochi.'

■ Bibliographic Information
Title: We Do Not Collect (Bokura wa Kaishu Shinai)
Author: Kohei Mamon
Format: Paperback (Bunko)
Pages: 248
Release Date: May 28, 2026
ISBN: 978-4-488-40731-5
C-Code: C0193
Cover Illustration: Kashiwai
Book Design: Hirotoshi Taniguchi

■ Author Profile
Kohei Mamon (born 1999, USA). Completed a Master's degree at the University of Tokyo. Won the 19th Mysteries! Newcomer Award in 2022. Selected for 'Kappa Two' in 2023 for 'The Asaka Twins' Quarrel' (published as 'Bye-bye, Santa Claus: The Asaka Twin Detectives'). A rising talent noted for combining bold tricks with sensitive psychological depth.

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