The Struggle between the Cathars, the Templars, and the Church of Rome
by Otton Rahn
This is the daring book that popularized the legend of the Cathars and the Holy Grail. It presents the history of the Papal persecution of the Cathars that lies hidden in the medieval epic Parzival and in the poetry of the troubadours. Crusade Against the Grail has never appeared in English until now.
This book features heavily in the writing and romantic view of Gerhard Halstatt aka Kadmon, author of Blutleuchte.