Guilty Pleasures (Anita Blake Vampire Hunter) (1995)

From back cover Orbit paperback 2005: "I don't date vampires. I kill them." My name is Anita Blake. Vampires call me the Executioner. What I call them isn't repeatable. Ever since the Supreme Court granted the undead equal rights, most people think vampires are just ordinary folks with fangs. I know better. I've seen their victims. I carry the scars... But now a serial killer is murdering vampires -- and the most powerful bloodsucker in town wants me to find the killer...