The eccentric, infamous and exceedingly wealthy romantic novelist Cassandra Tipp has vanished. But she has left behind what seems to be a letter. Everyone knows Cassie has twice been accused of murder. Her family have long been convinced of her guilt. Could this be her confession? Or her last will and testament? It turns out to be not quite what anyone expected. For the letter recounts two extraordinary, darkly disturbing stories. One is the story of bloody nights and magical gifts, of children lost to the woods, of husbands made from twigs and leaves and sticks and stones . . . The other is the story of a little girl who was cruelly treated and who grew crooked in the shadows . . . But which story should we believe? Both stories might be true. Both stories end in murder. And where is Cassie now? Dead in a ditch, or gone from this world . . . and into another? You Let Me In is an extraordinary tale of supernatural seduction and the story of an abused child. Crossing the boundaries between the reality and somewhere else entirely, we are shown our world - judgemental and cruel - and offered glimpses of another, dark and rather different place that is hidden to most of us.