Margaret Starbird reveals strong links between the trumps of the tarot and the medieval heresy of the Holy Grail. Explaining the trumps as a catechism of the Grail Secrets casts new light on the origins of the enigmatic trumps. The book includes the extant trumps of the "Gringonneur/Charles VI" deck and numerous drawings of medieval watermarks related to the Holy Grail and to the heresy of the Merovingian bloodline whose adherents believed that Jesus was married and that his wife and child found political refuge in Gaul. This bloodline, the sang raal of the royal house of King David, reportedly survived in Western Europe. The mysterious tarot trumps provide a visual catechism for a faith that was brutally suppressed by the Roman Catholic Inquisition. They whisper the Great Secrets (major arcana) of the alternative Christian Church of the High Middle Ages--the Church of Love.