Yasuhiko Nishizawa's entertaining mystery novel, The Man Who Died Seven Times is about 16-year-old Hisataro who has a rare condition that causes him to relive the same day nine times. When his grandfather is murdered during a family celebration on New Year's Eve, Hisataro wakes up to find himself trapped in a time loop where he is determined to discover the truth about his Grandfather's death. Each version of the day reveals a different culprit, with each family member harbouring motives and secrets about their family patriarch's inheritance.

Hisataro's character has termed his time loop condition "The Trap". His early attempts to use it for good quickly gave way to a weary, almost nihilistic outlook on life, earning him the nickname "Gramps" for his prematurely jaded perspective. The novel is clever and engaging for the most part, but as the story progresses it occasionally veers into the overdramatic, and is almost cheesy in some parts. 

While The Man Who Died Seven Times isn't the best novel in the world, it is definitely a fun read. Any fans of time loop/time travel narratives and cosy mysteries will enjoy it. It's a perfect, easy-to-read novel that will keep you very entertained.