“Medieval canon law can seem a forbidding field to non-specialists but is of crucial importance for understanding many key themes in medieval history: marriage and sexual behaviour; relations between Church and State; heresy and its persecution, among others. This distinguished series provides what historians of medieval Europe and of European law have long needed: an accessible, in-depth and authoritative survey of the field, each aspect covered by a renowned expert, and informing non-specialists and specialists alike of the current state of knowledge and latest scholarly debates and research in this vibrant field.”—Peter Clarke, University of Southampton