Witchy eye : flight of the Serpent's daughter

"Sarah Calhoun is the 15 year old daughter of the elector Andrew Calhoun, one of the electors who gets to decide who will ascend as the emperor of the New World. None of that matters to Sarah. She has a natural talent for hexing and one bad eye, and all she wants is to be left alone. But then a Yankee wizard-priest tries to kidnap her. Sarah fights back with the aid of a monk named Thalanes, who is one of the not-quite-human Firstborns. It is he...