Twisty, ingenious, unguessable . . .'So clever, and has the perfect twist' GILLIAN McALLISTERWhat 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?Can someone be guilty of the opposite of murder?PRAISE FOR SOPHIE HANNAH:'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