Excalibur: A Novel of Arthur
Bernard Cornwell
 The novel begins shortly after the end of Enemy of God. Arthur has taken full control of Dumnonia, Guinevere is imprisoned, Mordred who, while still king, has had his power taken away from him. Lancelot has joined with the Saxons and Derfel is trying to deal with both his daughter's death and his service to Arthur. Merlin is preparing for Mai Dun, a pagan ceremony that is said will bring the old gods back to Britain. Before the ceremony though Derfel must go and try to make his father Aelle turn against his ally Cerdic. Upon arrival Cerdic demands Derfel's death but Aelle says his son must fight a Saxon in single combat and if he wins he will be allowed to live. Derfel wins and stays the night but is unable to get his father to stop his attack on Britain. It is finally the time of Mai Dun the ceremony is not completed though due to Arthur realising that Nimue intends to sacrifice his son to bring the gods forth. Finally the Saxons invade, Derfel, who along with Ceinwyn and Guinevere, leads a group of survivors who are trapped at Mount Baddon. Derfel is impressed by Guinevere's efforts in the battle. Eventually, Arthur arrives along with Saragmor and Cuneglas and manage to win a victory over the Saxons. Derfel eventually finds Aelle and kill him. Lancelot is caught and hanged. Cuneglas is killed in battle and thus Arthur loses one of his greatest allies, also the price Arthur has to pay for Gwent's help is giving up his power. After gives up his power he leaves Derfel and Saragmor in charge of Dumnonia's army while Mordred is given back his power. At the same time Mordred goes on war raids later a messenger says he is dying while also being besieged. Derfel trying to avoid a succession issue goes to Arthur. He learns that Arthur does not want to be king but Arthurs son does. Pleased returns to Dumnonia to find Mordred still alive and learns that he faked his injuries and plans to take revenge on both Derfel and Arthur. Derfel manages to escape with the help of Taliesin. Derfel returns to find Ceinwyn is deathly sick, he tries everything to save her, but nothing works. He is taken to meet Nimue who says that she caused Ceinwyn's sickness and will only remove it if Derfel gives her Arthur's sword and Arthur's son. Derfel, having no were else to turn, goes to Morgan who offers to remove the fever if Derfel will agree to convert to Christianity and serve her husband, Sansum. To complete the spell, Derfel's hand is cut off. Mordred comes for Arthur and faces him at Camlan where Mordred is killed and Arthur is wounded. Derfel stops Nimue by throwing Arthur's sword into the sea (The English Channel) and watches as his friend and his lord sails away with Guinevere back to Armorica.