In Perfect Harmony — Jane Henry

Harmony is a newly recruited agent for the EPB -- a federal agency that monitors paranormal creatures and activities. Her first assignment is to get close to a centuries-old master vampire, Blake Delacroix. Harmony quickly realizes she is in over head as Blake's sensual hold on her becomes clear. But even more disturbing is the strange story he tells her about their love affair in a past life. Harmony's loyalties are tested as she is forced to choose between her boss and the man who believes she is the love of his eternal life.