Part One: The Book of King Arthur:
The Winning of Kinghood
The book begins by telling how young Arthur pulled a sword out of an anvil, how he learned of his royal lineage, and how he thus became king.
The Winning of a Sword
King Arthur loses to his enemy, King Pellinore. Merlin advises Arthur to seek Excalibur. The Lady of the Lake instructs Arthur on how to earn the sword, and, following her instructions, he takes Excalibur. He then meets Pellinore again, and with Excalibur's magic, he wins against him. The two thereafter make amends and become friends.
The Winning of a Queen
King Arthur is captivated by the Lady Guinevere. The notorious Duke of North Umber also wishes to marry her. The Duke torments the people of Cameliard by parading in front of the castle, calling for someone to challenge him and his men. Arthur accepts the challenge, gathers his Knights, and defeats the Duke and his companions. After the battle, Arthur reveals himself to King Leodegrance, and asks for the hand of his daughter.
Part Two: The Book of Three Worthies
The Story of Merlin
The Story of Sir Pellias
The Story of Sir Gawaine