Jessalynn Bird is an independent scholar. Edward Peters is Henry Charles Lea Professor Emeritus of History at the University of Pennsylvania. His many books include The First Crusade and Torture, which are also available from the University of Pennsylvania Press. James M. Powell was Professor of Medieval History at Syracuse University and author of the prize-winning Anatomy of a Crusade, 1213-1221 and Albertanus of Brescia: The Pursuit of Happiness in the Early Thirteenth Century, also available from the University of Pennsylvania Press.