古賀慶 has written at least 5 books. Their most popular book is ブルータル 殺人警察官の告白 1 with 3 saves with an average rating of 4.5⭐.
Series
5 primary booksAuthored 100% of series
Brutal: Confessions of a Homicide Investigator is a 5-book series with 5 primary works first released in 2019 with contributions by Kei Koga and 古賀慶.