Moon Called by Patricia Briggs (2010) Ace 

Mercy Thompson is a walker who can turn into a coyote.  She was raised in a werewolf pack.  Her boss at the car-repair shop is a very old elf.  Some clients are also of the supernatural types; vampires, werewolves, gremlins.  This is her normal world.  Then someone gets killed – at work, and all things fae break loose.