The Castrofax (The Father of the Fifth Age Book 1)

Gabriel never expected Princess Robyn to show up at his manor after word of her sudden disappearance. Because of his remarkable talent in wielding the elements, however, he is appointed her protector until she can take the throne, but word of his magical power slowly spreads to untrusting ears.
Imprisoned because his abilities constitute a threat, Gabriel fights for his freedom as Princess Robyn is forced to fight for her throne.
Only through learning the true meaning of strength can either of them be saved, but all power comes with a cost.