No Heart for a Thief - James Lloyd Dulin - Bog

We are the stories we tell ourselves...even the lies.
The Thief, a great spirit, and her descendants have abused their ability to steal magic for centuries. When Kaylo starts to hear the song of other people's magic, he must learn to hide from his people as well as the invaders. A gift or a curse, Kaylo may be able to save his people from the Gousht Empire that claimed their land with this stolen magic.
Eighteen years later, Kaylo still prays to the spirits, but not out of loyalty or love. He knows better than to rely on those selfish bastards for anything. While hiding in the forest from his foolish acts of rebellion, he encounters a girl, Tayen, being pursued by two soldiers of the empire. Against his better judgment, he risks facing the consequences of his past to intervene.
When Tayen attempts to run off seeking vengeance for her family, he offers to train her to wield her magic and a blade. If he can't convince her to relinquish her need for vengeance and stave off the demons of his past, he's going to get them both killed.