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The electrifying new novel from the Man Booker-shortlisted author of Everything UnderThe electrifying novel from the Booker shortlisted author of Everything Under. 'A short sharp explosion of a gothic thriller' ObserverSomething unspeakable has happened to sisters July and September. Desperate for a fresh start, they move across the country to an old family house that has a troubled life of its own. Noises come from behind the walls. Lights flicker of their own accord. Sleep feels impossible, dreams are endless.In their new, unsettling surroundings, July finds that the fierce bond she's always had with September - forged with a blood promise when they were children - is beginning to change in ways she cannot understand.