Japanese author Higashino won Japan’s Naoki Prize for Best Novel with this gripping and unpredictable mystery. After Yasuko and her daughter end up unexpectedly killing her violent and manipulative ex-husband, they find out that Ishigami, their neighbor, is eager to help them cover up the murder. Yasuko previously thought of Ishigami as a shy neighbor who taught high school math and kept to himself. When it comes to covering up the murder, Ishigami assures Yasuko that he has everything under control. Initially this seems to be the case. Even the two detectives assigned to the case come close to dismissing Yasuko and her daughter as suspects. But Kusanagi, the senior detective on the case, still suspects something is not right and seeks help from his friend Yukawa, a physics professor who has offered Kusanagi advice on past cases.
Don’t be intimidated if you were never good at math and science. The constant twists and turns as well as the unexpected loyalties and connections between the main characters make The Devotion of Suspect X a mystery you are likely to read quickly and then ponder for some time after the last page.