This was the best kind of brain bender! In the opening pages of this time travel mystery, a British woman watches in horror from her window as her 18-year-old son stabs a man on the street. A horrific scene ensues, the police take him away, she spends the evening at the station in shock and agony. But then Jen wakes up the next morning, only to find that it’s not the next morning at all, but the day before the crime occurred. When she wakes up the next morning, it’s the day before that. Jen seems to be living her life backward, and—with the help of a physicist friend-of-a-friend—determines that the only way to break out of the time loop is to “undo” whatever event put her son on the path to murder. To do that she has to go far, far back in time, getting to the roots of her most important relationships. This may end up on my best of the year list; it will certainly be one of my most enjoyable reading experiences.

From the publisher: "22-year-old Olivia has been missing for one day…and counting. She was last seen on CCTV, entering a dead-end alley. And not coming back out again. Julia, the detective heading up the search for Olivia, thinks she knows what to expect. A desperate family, a ticking clock, and long hours away from her husband and daughter. But she has no idea just how close to home this case is going to get. Because the criminal at the heart of the disappearance has something she never expected. His weapon isn’t a gun, or a knife: it’s a secret. Her worst one. And her family's safety depends on one thing: Julia must NOT find out what happened to Olivia - and must frame somebody else for her murder. If you find her, you will lose everything. What would you do? This clever and endlessly surprising thriller is laced with a clever look at family and motherhood, and cements Gillian McAllister as a major talent in the world of suspense and a master of creating ethical dilemmas that show just how murky the distinction between right and wrong can be."