Seddon offers new insights into the roles of Arthur, Merlin, and the Knights of the Round Table, discussing in detail about how they are linked to the metaphysical truths in the works of Taliesin and the Mabinogion, as well as the legends of Parsifal and the Holy Grail. He sheds light on the unifying spiritual tradition that reaches beyond Arthur and Tintagel to the mysteries of modern times as elucidated by Rudolf Steiner.