Danganronpa Kodaka ～ 890 days for "Danganronpa"

Danganronpa Kodaka ～ 860 days for "Danganronpa" (ダンガンロンパ小高　～『ダンガンロンパ』を作りながらの890日～) is a non-fiction anthology written by Kazutaka Kodaka and featuring illustrations by Rui Komatsuzaki. The book is a collection of Zettai Zetsubō Kodaka articles that ran biweekly in Famitsu magazine for 2.5 years (860 days). Zettai Zetsubō Kodaka articles were written by Kodaka, and covered development of the history of the series, and commentary on the then-latest entries to the franchise, such as behind-the-scenes details of Danganronpa 3: The End of Hope's Peak Academy episodes and Danganronpa Gaiden: Killer Killer.

It was released on March 30th, 2017, with a special signing event at Super Danganronpa 2 The Stage 2017 where Kodaka signed copies of the book. Who purchased the novel at the event also earned a copy of the card featuring a logoless version of the cover illustration.