The Mercenary's Bride by Claire Delacroix

Robbed of his possessions, wounded and left for dead, Quentin de Montgomerie has lost everything except his love for Mhairi, the daughter of the Hawk of Inverfyre—and he knows who is to blame for his fate. He vows to return to Inverfyre and take his vengeance from the Hawk, but arrives to discover that the fierce maiden in possession of his heart has blossomed into a beauty, and that her kiss has the power to give him hope for the future again. Can Quentin prove himself to the Hawk and win Mhairi—or will she spurn him for being less than once he was?