Morrigan's Cross
by Nora Roberts, 2006
Series: The Circle Trilogy

"As a storm rages, the tale of a powerful vampire's lust for destruction-and of the circle of six charged by the goddess Morrigan to stop her-begins. One of the chosen is a medieval sorcerer whose quest will take him through time-and into the arms of a woman courageous enough to link her destiny to his own."
(From Amazon.com)

Paperback Info: ISBN 0515141658, Jove