"Memory, Sorrow, and Thorn" is a fantasy trilogy written by Tad Williams. The series includes three main books: The Dragonbone Chair, Stone of Farewell, and To Green Angel Tower. Set in the fictional world of Osten Ard, the story follows the journey of a young man named Simon as he navigates a realm filled with magic, political intrigue, and ancient prophecies. The narrative explores themes of memory, loss, and the struggle against dark forces, particularly the malevolent Storm King. The trilogy is known for its rich world-building, complex characters, and deep emotional resonance, influencing many later works in the fantasy genre.