As I sleep, my mind will erase everything I did today. I will wake up tomorrow as I did this morning. Thinking I'm still a child. Thinking I have a whole lifetime of choice ahead of me ...' Welcome to Christine's life. Quite simply the best debut novel I've ever read. - Tess Gerritsen. Brilliant in its pacing, profound in its central question, suspenseful on every page - and satisfying in its thriller ending. - Anita Shreve. A deft, perceptive exploration of a fascinating neurological condition, and a cracking good thriller. -Lionel Shriver. A terrific first novel - well-written, genuinely unsettling and psychologically very plausible. Thrillers seldom come much better than this. Loved it, read it in one - Joanne Harris. An exceptional thriller. It left my nerves jangling for hours after I finished the last page - Dennis Lehane. So high-concept, so ambitious and so structurally brilliant. It's so rare to read a thriller that's perfect in every detail, but this one definitely qualifies! - Sophie Hannah. A deeply unsettling debut that asks the most terrifying question - what do you have left when you lose yourself? - Val McDermid. A truly amazing debut. The central character, Christine, is beautifully drawn. It's hard to imagine a more compelling, believable and sympathetic portrayal of a damaged human being.