After Human — Michael Cross

An Insatiable Hunger
He calls himself Io. He is a vampire who refuses to keep his brutal appetite in check. His latest feast was a bloodbath, leaving behind more than twenty mutilated corpses--and a high-profile missing person...

Nikka Seven has lived more centuries than she cares to remember. She wields power over human and demon alike, weaving lies in the media to keep the public ignorant of the existence of vampires. But this latest carnage threatens to destroy her carefully constructed web of deception--placing both the mortal and immortal worlds in very grave danger.

Between them stands Caleb Darr. He has no love for humanity, or for his fellow vampires. Weary of his undead life, he wishes for eternal rest--yet cannot help wondering why Nikka has chosen him as Io's executioner. It's a mission that will take him into a dizzying realm of Dionysian death parties, Internet sacrifices, and the apocalyptic visions of a madman...and into a terror that will make Caleb Darr wish very much to stay alive...