The King of Powys - The Shadow of Avalon, #1

This is the story of King Arthur. Set in the west of Britain during the years that span the end of the fifth and the beginning of the sixth centuries, it is told in the voices of ten people who knew him well, and whose lives were affected by him. It is a tale of war, love, jealousy, hatred, sacrifice and courage. Through it all, the legend of King Arthur is built and embedded into history, never to be forgotten.
From the viewpoints of the ten narrators, the novel follows the whole life of King Arthur and the many facets of the king's nature are revealed. He is surrounded by people needing him or using him for their own devices but it is only Myrddin, who stands apart and dispassionate, whom he really trusts. And that trust ultimately proves fatal. The novel is the first of the trilogy 'The Shadow of Avalon', which chronicles the time of King Arthur and the generation following him.