Dark-Hunter: v. 1: Dark-Hunters by Claudia Campos, Sherrilyn Kenyon, ISBN 9780312376871

Publisher Description:
In the war against vampires, mankind has only one hope: The Dark-Hunters. Ancient warriors who died of brutal betrayal, the Dark-Hunters have sworn themselves into the service of the goddess Artemis to protect us. It's a pact with pretty good perks. Immortality, power, psychic abilities, wealth and a cool wardrobe. But it comes with a few drawbacks: fatal sun poisoning and a new, irreparable dental problem. But aside from the fangs and nocturnal lifestyle, it's not so bad. Until Kyrian meets the most frightening thing imaginable. An accountant who's being hunted by one of the most lethal vampires out there. If Amanda Devereaux goes down, so does he and no offense, he doesn't want to die (hence the whole immortality thing). And he doesn't want humanity dead either which is a good thing for us since he and Amanda are all that stands between us and oblivion. Let's hope they win.