King's Blood (William the Conquerer #2) (William the Conquerer)

Red William, the eldest son of William the Conqueror, has inherited the throne, but his decision to leave magic out of his rule causes the land to wither and die.The fate of Britain lies in the hands of Edith, princess of Scotland, and Henry, the youngest son of the Conqueror. Both are highly gifted in magic-but only the blood of a king will cleanse the realm from the evil infesting it.