"The History of the Kings of Britain" is a mythical historical account of British history, written around 1136 by Geoffrey of Monmouth. It chronicles the lives of the kings of the Britons in a chronological narrative spanning a time of two thousand years, beginning with the Trojans of Homer's Iliad, the founding the British nation and continuing until the Anglo-Saxons invasion of Britain around the 7th century.
Very entertaining and believed to be the source of at least two Shakespeare plays, "King Lear" and "Cymbeline." There is also an account of Julius Caesar's invasion of Britain, and the story of Merlin, Uther Pendragon, and King Arthur and the historical Conan.