An imaginative tale, symbolic and haunting and yet at times wryly humorous, is substantial fare for the young adult enthusiast of intricate plot maneuvers. An Aegean island wrapped in mystery prozies the setting for three plots which crisscross and eventually merge. There's the story of Kate who lands on Keritha and rediscovers lost friends. There's the challrs story how deprived they were in England until they returned to their heritage as lords of the isle. And there is Selwyn Potter's story -- Selwyn who ties the loose threads together as the magic of the island changes him.