Richard Kieckhefer has taught in Religious Studies and History and is now Emeritus Professor at Northwestern University, where his work focuses on the history of late medieval religious culture and the history of magic and witchcraft, with particular focus on the late Middle Ages. His published books include European Witch Trials: Their Foundations in Popular and Learned Culture, 1300-1500 (1976), Repression of Heresy in Medieval Germany (1979), Unquiet Souls: Fourteenth-Century Saints and their Religious Milieu (1984), Forbidden Rites: A Necromancer's Manual of the Fifteenth Century (1997), Theology in Stone: Church Architecture from Byzantium to Berkeley (2004) and Hazards of the Dark Arts: Advice for Medieval Princes on Witchcraft and Magic (2017).