"The Once and Future King" is a novel by T.H. White that retells the legend of King Arthur and his rise to power. The story is divided into four parts, exploring themes of chivalry, justice, and the complexities of human nature. It begins with Arthur's childhood, where he is raised by Sir Ector and learns valuable lessons from the wizard Merlin. The narrative also delves into the relationships between Arthur, Guinevere, and the knights of the Round Table. It examines the challenges of leadership and the eventual downfall of Camelot, highlighting the cyclical nature of history and the enduring hope for a better future.