The perfect alibi. The perfect motive. The perfect lie?Jemma Stelling walks into a police station and confesses—not to a murder she's committed, but to the one she's terrified she might. Jemma can't stop herself from thinking about murdering her stepmother, Marianne Upton. The only way stop herself might be to confess before she snaps and does the unthinkable.But while Jemma is still giving her statement, a call comes in: Marianne has just been found stabbed to death, killed in exactly the way Jemma described. Suddenly, the woman desperate to prevent a murder has an unshakeable alibi… and a disturbingly accurate description of the crime she couldn't have committed. Is Jemma an innocent bystander? Or a brilliant, cold-blooded killer who planned everything down to the minute?In The Opposite of Murder, New York Times bestselling author Sophie Hannah unveils another mind-bending mystery—an impossible puzzle guaranteed to hold readers spellbound to the very end.