Top 3 Picks:

Strayer, Joseph R. The Albigensian Crusades (Ann Arbor: University of Michigan Press, 1992; originally published 1971) This classic work on the destruction of the Cathar communities in southern France is now available in paperback for only $15.26.

Costen, Michael The Cathars and the Albigensian Crusade (Manchester & New York: Manchester University Press, 1997) Only $19.95.

Lambert, Malcolm The Cathars (Oxford: Blackwell Publishers, 1998) $27.16.