Bungo Stray Dogs Series Novels

The Untold Origins of the Detective Agency (Bungo Stray Dogs 3) by Osamu Dazai
Osamu Dazai and the Dark Era (Bungo Stray Dogs 2) by Osamu Dazai
Osamu Dazai's Entrance Exam (Bungo Stray Dogs 1) by Osamu Dazai