Mark Gregory Pegg examines the sole surviving manuscript of this great inquisition with unprecedented care--often in unexpected ways--to build a richly textured understanding of social life in southern France in the early thirteenth century. He explores what the interrogations reveal about the individual and communal lives of those interrogated and how the interrogations themselves shaped villagers' perceptions of those lives. The Corruption of Angels, similar in breadth and scope to Emmanuel Le Roy Ladurie's Montaillou, is a major contribution to the field. It shows how heretical and orthodox beliefs flourished side by side and, more broadly, what life was like in one particular time and place. Pegg's passionate and beautifully written evocation of a medieval world will fascinate a diverse readership within and beyond the academy.