Claimed By Shadow - Karen Chance

Claimed By Shadow is the second novel in the Cassandra Palmer series.  Now Cassie's chasing Tony instead of the other way around.  Unfortunately she's got war mages and vampires chasing her, the little matter of a geis to deal with, and she's still trying to figure out what powers she has and how to use them as heir to the Pythia.  A great series.  Highly recommended.