Yasuko lives a quiet life, working in a bento shop in Tokyo, as a good mother to her only child. When her ex-husband suddenly appears at her door, her comfortable world collapses. Detective Kusanagi of the Tokyo police attempts to piece together the events of that day and encounters the most complex and mysterious circumstances he has ever investigated. Nothing in front of him makes sense, and it will take a genius to understand the genius behind this particular crime... One of the most popular Japanese thrillers, and the inspiration for a cult film, The Devotion of Suspect X is now being discovered worldwide. The combination of relentless storytelling, the enchanting setting of Tokyo, and the completely unexpected conclusion make it a must-read for anyone interested in international literature.