Ancient Druid Atticus O’Sullivan has had plenty of adventures during his long life, and in “The Chapel Perilous” he shares one of them with his apprentice, Granuaile. He lays out the true story of the quest for the Holy Grail, in which he was personally involved—and the events of which are quite different from the Christian tale most people know today. While on an errand for Ogma to recover the Dagda’s Cauldron, Atticus confronts evil at a mysterious chapel, takes the first steps to becoming the Iron Druid, and learns the shocking truth about goblin fashion choices. He was, of course, in terrible peril.