"Memory Sorrow and Thorn" is a fantasy trilogy written by Tad Williams. It consists of three novels: The Dragonbone Chair, Stone of Farewell, and To Green Angel Tower. The story follows a young kitchen boy named Simon as he embarks on a quest to save his world from dark forces and uncover his own destiny. Set in the richly detailed world of Osten Ard, the series explores themes of friendship, loss, and the struggle between good and evil. The narrative is known for its intricate character development and expansive lore, making it a significant work in modern fantasy literature.