It is a terrifying mix of high technology -- a living building which pervades the novel as an ever-watchful, ever-vengeful character, and a typical medieval torture chamber -- chains, great halls, dungeons. A young prisoner, Finn, has haunting visions of an earlier life, and cannot believe he was born here and has always been here. In the outer world, Claudia, daughter of the Warden of Incarceron, is trapped in her own form of prison -- a futuristic world constructed beautifully to look like a past era, an imminent marriage she dreads. She knows nothing of Incarceron, except that it exists. But there comes a moment when Finn, inside Incarceron, and Claudia, outside, simultaneously find a device -- a crystal key, through which they can talk to each other. And so the plan for Finn's escape is born ...

    He can’t remember how he got there, what happened after, and why his life seems so different now. And it’s not just Kane who’s different, the world feels off, reality itself seems different. As Kane pieces together clues, three almost-strangers claim to be his friends and the only people who can truly tell him what’s going on. But as he and the others are dragged into unimaginable worlds that materialize out of nowhere—the gym warps into a subterranean temple, a historical home nearby blooms into a Victorian romance rife with scandal and sorcery—Kane realizes that nothing in his life is an accident. And when a sinister force threatens to alter reality for good, they will have to do everything they can to stop it before it unravels everything they know. This wildly imaginative debut explores what happens when the secret worlds that people hide within themselves come to light.