STUDIES ON THE LEGEND OF THE HOLY GRAIL: WITH SPECIAL REFERENCE TO THE HYPOTHESIS OF ITS CELTIC ORIGIN ALFRED NUTT 1888
THE LIGHT OF BRITANNIA: THE MYSTERIES OF ANCIENT BRITISH DRUIDISM UNVEILED; THE ORIGINAL SOURCE OF PHALLIC WORSHIP, AND THE SECRETS OF THE COURT OF KING ARTHUR REVEALED; THE CREED OF THE STONE AGE RESTORED, AND THE HOLY GRAEL DISCOVERED IN WALES OWEN MORGAN 1893
SERPENTS OF FIRE: NAZI FLYING SAUCERS, THE HOLY GRAIL, AND THE HITLER/HOLLOW EARTH CONNECTION FLORIA BENTON 1983
THE OCCULT AND THE THIRD REICH: THE MYSTICAL ORIGINS OF NAZISM AND THE SEARCH FOR THE HOLY GRAIL JEAN–MICHEL ANGEBERT 1974
THE HIDDEN CHURCH OF THE HOLY GRAAL: ITS LEGENDS AND SYMBOLISM CONSIDERED IN THEIR AFFINITY WITH CERTAIN MYSTERIES OF INITIATION AND OTHER TRACES OF A SECRET TRADITION IN CHRISTIAN TIMES ARTHUR EDWARD WAITE 1909