Crimson Death by Laurell K. Hamilton — book slip

Anita Blake faces a new challenge as her vampire servant, Damian, is plagued by violent nightmares and blood sweats, threatening his very existence. As the vampire who created Damian loses control, rogue vampires break taboos, unleashing chaos. Anita must join forces with her friend Edward to stop the carnage, even if it means traveling to Ireland, a place hostile to vampires, assassins, and necromancers alike.

For fans of dark urban fantasy with a strong romantic thread.