John L. Esposito, University Professor of Religion and International Affairs, and Founding Director of the Center for Muslim-Christian Understanding at the Walsh School of Foreign Service at Georgetown University. A past president of the Middle East Studies Association, he is editor-in-chief of the four-volume Oxford Encyclopedia of the Modern Islamic World, editor of the Oxford History of Islam, and the author of numerous books, including Unholy War: Terror in the Name of Islam, The Islamic Threat: Myth or Reality, and most recently, the Oxford Dictionary of Islam.
http://globetrotter.berkeley.edu/people3/Esposito/esposito-con0.html