"Agatha Christie meets Groundhog Day...quite unlike anything I've ever read, and altogether triumphant." -- A. J. Finn, #1 New York Times-bestselling author of The Woman in the Window Shortlisted for the Costa Award One of Stylist Magazine's 20 Must-Read Books of 2018 One of Harper's Bazaar's 10 Must-Read Books of 2018 One of Guardian's Best Books of 2018 The Rules of Blackheath Evelyn Hardcastle will be murdered at 11:00 p.m. There are eight days, and eight witnesses for you to inhabit. We will only let you escape once you tell us the name of the killer. Understood? Then let's begin... *** Evelyn Hardcastle will die. Every day until Aiden Bishop can identify her killer and break the cycle. But every time the day begins again, Aiden wakes up in the body of a different guest. And some of his hosts are more helpful than others... The most inventive debut of the year twists together a mystery of such unexpected creativity it will leave readers guessing until the very last page.