Valley of Silence
by Nora Roberts, 2006
Series: The Circle Trilogy

"The battleground has been chosen for the final showdown between those selected by the gods and the minions of the vampire Lilith. But there is one vampire who dares stand against her. And his love for the scholarly queen of Geall will complete the circle of six-and change the face of eternity."
(From Amazon.com)

Paperback Info: ISBN 0515141674, Jove