About the Book: Yachiyo Furugami, tormented by sleepwalking and a chilling warning to ‘walk not at night,’ becomes entangled in a case when a decapitated body is discovered on her family’s estate, killed with an ancestral samurai sword. As the baffled police call in famed detective Kosuke Kindaichi, a second murder strikes before he can solve the first. A classic Japanese locked-family mystery in which Kindaichi races to uncover the Furugami family’s secrets before they destroy the family entirely.