I was referred to a book, perhaps more of a pamphlet, by Michel Roquebert, Published in France by Editions Loubatiers Toulouse entitled Cathar Religion, which unfortunately has no IBSN.
Michel is concerned with proving that despite many differences from the Church of Rome the Cathar religion was Christian. Of course to say it was based on the teaching of Jesus is a totally different issue, but that is a distinction Michel does not attempt to make.
I was given access to a second book “ La Religion des Cathares” by Jean Duvernoy published in 1967 By Privat, Toulouse which again had no IBSN.
Strangely even these “local” documents give a picture different from the oral record.
Moving further afield the available documentation is even more at variance.
The Inquisitor’s Manual of Bernard Gui [d.1331], early 14th century, translated in J. H. Robinson, Readings in European History, (Boston: Ginn, 1905), pp. 381-38.
Raynaldus, “Annales,” in S. R. Maitland, trans., History of the Albigenses and Waldenses, (London: C. J. G. and F. Rivington, 1832), pp. 392-394.
le Roy Laudrie
Montaillou: Cathars and Catholics in a French village, 1294-1324, Emmanuel Le Roy Ladurie – 1998 Barbara Bray translation 2008
The Questions of John)
This is one of the most important extant Cathar Scriptures and a major addition to the apocryphal Johannine literature.
Wakefield and Evans
Walter L. Wakefield and Austin P. Evans, Heresies of the High Middle Ages (2nd ed., New York: Columbia University Press, 1991), p. 458ff. (and based on the translation of Reitzenstein in “Die Vorgeschichte der christlichen Taufe.”)
Cathar Ritual (Lyon Ritual) (Manuscript: Lyon, Bibliothèque municipale, PA 36) http://www.rialto.unina.it/prorel/CatharRitual/Cathrit.htm (latin)