Andrew Rippin, FRSC, Ph.D. (1981) McGill, is Professor Emeritus, University of Victoria, Canada, and Senior Research Fellow, Institute of Ismaili Studies, London. His works include The Qur’an and its interpretative tradition (2001), and Muslims, their religious beliefs and practices (4th ed., 2012). Roberto Tottoli, Ph.D. (1996) Naples, is Professor of Islamic studies, Università di Napoli L’Orientale, Italy. His works include Biblical Prophets in the Qur’ān and Muslim Literature (2002) and Catalogue of the Islamic Manuscripts from the Kahle Collection in the University of Turin (2011).