Books like Mercy Blade

Things are heating up in the Big Easy. Weres have announced their existence to the world, and revived the bitter tensions that run between them and their old enemies: vampires. As a trusted employee of Leo Pellissier, Blood Master of the City, Jane finds herself caught in the cross fire. When Jane is attacked by a pack of marauding werewolves, she is thankful for the help of a mysterious stranger named Girrard. He explains that he used to be Leo's 'Mercy Blade,' a sacred position charged with killing vampires who have gone insane. What Jane doesn't know is why this powerful assassin left New Orleans--or, more troubling, why he's now returned. It's definitely not to make Jane's life easier...