The Spell-Bound Scholar (Warlock's Heirs #3)

Gregory Gallowglass is the eligible bachelor on the planet of Gramarye. The youngest son of the High Warlock Rod Gallowglass and the witch Gwendolyn, his powers of intellect and magic are without equal. But he's best known for his pure heart -- one that is impervious to love. To Moraga, sworn enemy of the Gallowglass family, Gregory's heart is the ultimate challenge. Through her spells, she will bring him under her power -- and then destroy him...