No-one knows you better than your family. They know the little things that make you smile. They know your darkest secrets. Sure, you haven't always been best friends. But if it seemed as though someone was after you, that you might be in danger, then you'd be on each other's side . . . Right? So gripping you won't stop reading. So twisty that you won't know who to trust. And so dark that you'll realise something truly chilling: No-one is more dangerous than the ones who know you best.