Yasuko leads a quiet life, working in a bento shop in Tokyo and being a good mother to her only child. However, when her ex-husband unexpectedly shows up at her door one day, her comfortable world is shaken. As Detective Kusanagi from the Tokyo police tries to piece together the events of that day, he faces the most puzzling and mysterious circumstances he has ever investigated. Nothing seems to make sense, and it will take a genius to understand the mastermind behind this particular crime.

One of the best-selling Japanese thrillers of all time and the inspiration for a cult film, The Devotion of Suspect X is now being discovered worldwide. The combination of a gripping story, the impressive backdrop of Tokyo, and a completely surprising ending makes it a must-read for anyone interested in international literature.