What is the grail? A chalice? Stone? Anagram? Code Word for a new world order? Secret dimension? "A Thing Called The Grail" has had us mystified and fascinated for nearly a thousand years. "The Thing" suddenly appeared; mysteriously well coordinated accounts spread like wildfire over a few decades then vanished, only for the enigmatic motif to reappear just as suddenly five-and-a-half centuries later. Still with us, becoming a household word for any ultimate solution, The Holy Grail has generated a history of research, artistic creativity, obscure metaphysics, political use and abuse that reads like a thriller in its own right.