Jiana Awakens, The Legends of Greenstone, Book One

Heiress to Castle Greenstone, Jiana is under attack by her uncles and the neighboring Emperor. Against all odds the Duchess must learn the use of her newfound powers as a witch, and save herself and her people. Kidnapped by her uncles, she is saved by a mercenary to whom she becomes attracted. But such an affair is forbidden, even if they can survive the coming wars.