Burnt Offerings by Laurell K. Hamilton

"Feared by vampires as "The Executioner," Anita Blake finds herself not only sharing a bed with Jean-Claude, the Master Vampire of the City, but also defending St. Louis's vampire-owned businesses from an arsonist, policing a local werewolf pack and their alpha, her former lover Richard, and playing politics with the vampire ruling council."

Mass market, a nice copy!