Guilty Pleasures (Anita Blake, Vampire Hunter #1) by Laurell K. Hamilton

Anita Blake is small, dark, and dangerous. Her turf is the city of St. Louis. Her job: re-animating the dead and killing the undead who take things too far. But when the city’s most powerful vampire asks her to solve a series of vicious slayings, Anita must confront her greatest fear—her undeniable attraction to master vampire Jean-Claude, one of the creatures she is sworn to destroy...