Sophie Hannah's jaw-dropping, twisty, unguessable new thriller has readers hooked!'This murder mystery really did blow my mind. It kept me awake at night! Absolutely brilliant' ?????'Sophie Hannah at her twisty, absorbing, brilliant best' ?????'INGENIOUS! I challenge anyone to unravel this clever whodunit' ?????'Sophie Hannah could well be our modern Christie, such a deliciously complicated plot. Her best yet!!' ????? 'This lived up to its press for me. I loved every page - a truly impossible puzzle!!' ?????What if the only way to prevent a murder is by confessing to it?Jemma Stelling has confessed to a murder - one she can't have committed. She has an unshakeable alibi: when Marianne Upton was stabbed to death outside her home, Jemma was at the police station confessing to a murderous obsession with Marianne and a plan to kill her in precisely the way she was killed. So is Jemma innocent? Or is she an ingenious, cold-blooded murderer?PRAISE FOR SOPHIE HANNAH:'Such a clever, twisty book - I loved it!' HARRIET TYCE'A new novel by Sophie Hannah is a cause for celebration!' ALEX MICHAELIDES'One of the best crime writers currently working' SCOTSMAN'High concept and so satisfying' GILLIAN McALLISTER'Brain-bending' GOOD HOUSEKEEPING