The Quest of the Holy Grail adds a spiritual dimension to the adventures of Arthur's knights.Galahad replaces Lancelot as the central figure, though he appears and disappears so often that many of the knights are engaged in a quest to find him rather than the Grail.The central concept of the Grail was never accepted by the Church, and the Quest remains a secular romance which can be interpreted as a spiritual allegory.This is done by the hermits who appear throughout the story, pointing out the meaning of each adventure.The adventures have a strong element of the magical and otherworldly, and the story is more closely structured than Lancelot, with the accomplishment of the Grail adventure by Galahad, Perceval and Bors as its centre and culmination. For a full description of the Vulgate Cycle see the blurb for the complete set.