The Lioness and Her Knight by Gerald Morris

This book retells the story of Ywain and Laudine with some additions and Morris's Seelie Court (of fairies and magic) involved. As usual, Morris makes the secondary characters (the ones of his own devising, or the ones peripheral to the traditional legends) far more interesting and sympathetic, perhaps in part because he has more leeway to do as he likes with them. I particularly liked seeing the development and maturation of Luneta.