F. Donald Logan holds a Licentiate as well as a Doctorate from the Pontifical Institute of Mediaeval Studies. He has taught at Emmanuel College, Boston, where he is now Professor Emeritus of History. A sometime Fulbright Scholar and Guggenheim Fellow, he is also a fellow of the Royal Historical Society and Society of Antiquaries of London, and Honorary Fellow of the Institute. He is the author of Excommunication and the Secular Arm in Medieval England: A Study in Legal Procedure from the Thirteenth to the Sixteenth Century (1968), Runaway Religious in Medieval England, c.1240–1540 (1996), and The Medieval Court of Arches (2005), together with numerous articles. A History of the Church in the Middle Ages, released first in 2002, appeared in a second edition in 2013, and The Vikings in History, published originally in 1983, was translated into Spanish, German, Romanian, and Italian before being reissued in a third edition in 2005.