Playing with Fire ~ Katie MacAlister

this is the first book in the Silver Dragons series, an offshoot of the Aisling Grey series. May is a doppleganger, who is bound to a demon lord. After being assigned to steal an item from one of the dragon wyverns, May encounters Gabriel, the wyvern for the silver dragons. They battle through the misadventures of May's twin, Cyrene, and May herself, while trying to figure out who is after them and how to bet May free of her demon lord.