'Perfection, every word, every moment. One of the best books I've ever read' LISA JEWELL 'Wow. Amazing! Loved every page . . . If you are looking for a summer read, I've found it!' HOLLY WILLOUGHBY 'Page-turning time-loop thriller . . . An intelligent puzzle full of heart and good sense' GUARDIAN 'A mind-bending page-turning thriller. Non-stop thrills right from the start. A rare gem' STEVE WRIGHT, RADIO 2 BOOK CLUB 'A spellbinding "whydunnit". A novel with a difference' SUNDAY TIMES 'Skilful, satisfying. Couldn't put it down. Don't miss it!' OBSERVER, 'THRILLER OF THE MONTH' CAN YOU STOP A MURDER AFTER IT'S ALREADY HAPPENED? . . . DISCOVER THE MOST TALKED ABOUT THRILLER OF THE YEAR It's late. You're waiting up for your son. Then you spot him: he's with someone. And - you can't believe what you see - your funny, happy teenage boy stabs this stranger. You don't know who. You don't know why. You only know your son is charged with murder. His future is lost. That night you fall asleep in despair. But when you wake . . . it is yesterday. The day before the murder. Somewhere in the past lie the answers - a reason for this crime.