"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