Philip Jose Farmer, the bestselling author of Riverworld, introduces a fantasy whose very name means danger and intrigue.Plunging into a vast prison that spans a planet, Clive Foliott faces a fantastic world of dwarves, cyborgs and aliens unlike anything he has ever imagined. It is a multi-leveled collection of beings from the hidden folds of time and space. Trapped somewhere inside is Neville Foliott, Clive s twin brother, and no creature in the Dungeon will stop Clive from finding him!