Blood and Honor — Simon R. Green

THE ENCHANTED PRINCE

Jordan had always prided himself on his acting abilities, but now he faced the challenge of his career. Magicked into looking exactly like Prince Viktor, middle son of the recently assassinated King Malcolm, Jordan had been hired to pretend to be the prince as a war of succession raged at Castle Midnight. With both Viktor's elder brother, Lewis, and his younger brother, Dominic, only too eager to dispatch their middle sibling, thereby increasing their own chances to gain the crown, Jordan soon found himself hard pressed to survive. And in a castle where the winds of Unreality might at any moment sweep down upon the unsuspecting, leaving behind little that was recognizably human, Jordan could only hope for a very short run in the role of prince and a quick escape from the kingdom with the fortune promised him for a successful job.

But fate--or perhaps a magical conspiracy--was about to rewrite the script for everyone at Castle Midnight, and only time would tell who would live to claim the throne and who would rule among the legions of the dead....