Demon's Kiss. Wings In the Night, #10

Wings in the NightVampire Romance that set the standard Killer in Life.In life, he was Raphael Rivera, a trained CIA assassin. But they messed with his mind, programming him with a trigger that can send him into a murderous rage beyond his control. Killer in Death.He goes by Reaper now. He's a vampire-the one the elders call on when one of their own goes rogue and needs putting down. As he sets off on his latest mission, to stop a ruthless, reckless vampire called Gregor from littering the mortal world with the bloodless corpses of innocents, Reaper picks up strays along the way. The Hero.Seth is an avid gamer and part-time hero who nearly lost his life to protect his friend from a mugging.
Seth's been having visions of a red-haired beauty he believes is his destiny. It turns out she's real, and being held captive by the very guy Reaper is after, so obviously, Seth has to tag along. The Shapeshifter.Vixen spent part of her time as a fox before she was made into a vampire. Now changing back is getting harder, and she fears she's losing a part of herself. The Heiress.Topaz is a rich, beautiful vampire who's just been burned by charming sexy con, Jack Heart.
Jack is Gregor's right-hand man, and Topaz might know where he is, but she won't say unless she gets to ride along. The con-man.Jack's a grifter with a heart of gold, who thinks the only reason he joins the gang is that it looks like they're winning. The traitor.Blindly loyal to Gregor until he tortures and tries to kill her, Briar is an abusive street-tough survivor he plucked from a path of self-destruction.
She owes Gregor everything, and yet she's undeniably, irresistibly attracted to Reaper, his sworn enemy. This is book 1 of 3 involving this undead ensemble cast.