City of Monsters - Andrea Speed

In a literal city of monsters, it's Hunter's job to sort out the inevitable messes: vampire debt collectors, werewolves who piss on everything, and surprise shifters. There's mundane problems, like paying rent, and keeping his haunted blender placated.
Always happy to be making money, he takes a job from a foul-mouthed reverse tooth fairy to find her missing twin. Just when things seem like they couldn't possibly get worse, in comes Sakari, a hot newcomer with a taste for danger.