Sign of the Unicorn

Amber is the one real world, of which all others—including our own Earth—are but Shadows. A traitor has revealed the royal family's greatest secret: the ability to manipulate Shadow and travel through all possible worlds, enabling a plot towards Amber's destruction. Corwin, Prince of the Blood, must risk everything in a deadly assault on evil's stronghold. Now, beset by demonic powers beyond imagination and betrayed by a bizarre conspiracy among his own kin, Corwin walks a perilous path toward ultimate knowledge and terrifying discovery.