Domninion
By Fred Saberhagen
Series: Saberhagen's Dracula

Vlad Tepes, who has wandered modern day America without fear, suddenly finds that he is not the only immortal in Chicago. He meets Merlin, who is controlled by Morgan La Fay. They become locked in the struggle for the ultimate magic Weapon, a struggle which leads them to New York. Vlad races to hide the weapon, and he is willing to destroy whoever gets in his way.

Paperback Info: ISBN 0812523865, Tor Books (available)