Mary Stewart
Mary Florence Elinor Stewart (born 1916) is a popular English novelist, best known for her series about Merlin, which straddles the boundary between the historical novel and the fantasy genre.
Arthur Pendragon is King! Unchallenged on the battlefield, he melds the country together in a time of promise. But sinister powers plot to destroy Camelot, and when the witch-queen Morgause – Arthur's own half sister – ensnares him in an incestuous liaison, a fatal web of love, betrayal, and bloody vengeance is woven.
Amazon: View on Amazon