Flames Among the Frost by Amy Hale

Trouble has a way of finding Jetta Mills, and she quickly learns that the best place for a frost dragon shifter is back within the warded borders of home-Havenwood Falls. When Conrad Monroe is hired to find a thief, the trail leads him to the Colorado mountains and Jetta. He doesn't know what he's getting into with her, and she has no idea that Conrad has quite a few secrets of his own.