Heartless Prince by Leigh Dragoon
When her town is ravaged by a witch, Evony is taken in by the royal family and raised as a hunter. Evony has a gift that allows her to sense the familiars of witches. Prince Ammon uses this skill in the fight against the witches. The prince invites Evony to go beyond the safe walls of the palace in order to prove himself to everyone by facing familiars on their own. Unfortunately, powerful witches steal Prince Ammon’s heart and kidnap his sister, Nissa. Now Evony is faced with the difficult task of rescuing both!