"Riddle-Master" is a fantasy novel written by Patricia A. McKillip, first published in 1976. It follows the journey of Morgon, a young prince who discovers his unique ability to solve riddles. As he navigates a world filled with magic and mystery, he learns about his destiny and the responsibilities that come with it. The story is set in the fictional land of The Riddle-Master Trilogy, which includes themes of identity, power, and the importance of knowledge. Throughout his quest, Morgon encounters various characters, including the enigmatic Riddle-Master, who challenge his understanding of himself and the world around him.