Malcolm Barber is Emeritus Professor of Medieval History at the University of Reading, UK. He is the author of books on the Templars, the Cathars and the Crusader States in the twelfth century, and the co-author of texts on the Templars, letters from the East in the twelfth and thirteenth centuries (with Keith Bate) and Ambroise's history of the Holy War (with Marianne Ailes). He taught history at the University of Reading for nearly forty years until his retirement in 2005.