The "last" chapter of The once and Future King," which tells how Arthur, Guenever, and Lancelot come to their ends.

Keeping watch over the young Arthur Pendragon as he grows, the prince and prophet Merlin Ambrosius is haunted by a vision of a magical sword -- the fabled sword Caliburn, hidden for centuries. Sheathed in fire and stone, water and ice, the sword of the Emperor Maximus is destined to reveal the true High King. When Uther Pendragon is killed in battle, the time of destiny is at hand, and Arthur must claim the sword from a perilous chapel to claim his...

Arthur Pendragon is King! Unchallenged on the battlefield, he melds the country together in a time of promise. But sinister powers plot to destroy Camelot, and when the witch-queen Morgause -- Arthur's own half sister -- ensnares him in an incestuous liaison, a fatal web of love, betrayal, and bloody vengeance is woven.