Susan Tyler Hitchcock, Ph.D. is the author of seven books and is currently at work on an eighth. A longtime student of religion, her doctoral dissertation explored the life and poetry of Percy Bysshe Shelley through modern theories of the psychology of religion. She lives near Charlottesville, Virginia.
John L. Esposito, is University Professor of Religion and International Affairs, and of Islamic Studies, at Georgetown University. His more than 25 books include World Religions Today, What Everyone Should Know about Islam: Questions and Answers, Unholy War: Terror in the Name of Islam, and The Islamic Threat: Myth or Reality? He is also Editor-in-Chief of the four-volume Oxford Encyclopedia of the Modern Islamic World.