The Tinkerer's Daughter

Breeze is an outcast, a half-breed orphan born into a world torn apart by one thousand years of war. Breeze never knew her elven mother. When her father -a human soldier- is called back to the war, he leaves Breeze in the safest place he knows: in the care of a reclusive tinker.The Tinkerman's inventions are frightening at first; noisy, smelly, dangerous machines that have little practical use. But elves mature quickly, and Breeze is no exception. When the war comes home, Breeze sees an opportunity. If she succeeds, she will change the world forever. If she fails, Breeze will be considered a traitor to both countries and she'll be hunted to her death.