Heresies of the High Middle Ages
Walter L. Wakefield and Austin P. Evans
New York, Columbia University Press, 1969.
Montaillou: The Promised Land of Error
Emmanuel Le Roy Ladurie ; [translated by Barbara Bray].
New York : G. Braziller, 1978.
Heresy and Authority in Medieval Europe
Peters, Edward
Philadelphia : University of Pennsylvania Press, 1980
The Birth of popular heresy
R. I. Moore (compiler)
New York : St. Martin’s Press, 1976
The Cathars and the Albigensian Heresy
M.D. Costen
Manchester, U.K. Manchester University Press, dist by St. Martin’s Press, 1997
The Lost Teachings of the Cathars
Andrew Phillip Smith
London: Watkins, 2015