Norman Calder, who died in 1998, was Senior Lecturer in Arabic at the University of Manchester, UK. His Studies in Early Muslim Jurisprudence and numerous articles have had a lasting impact on the study of Islamic law.
Jawid Mojaddedi is Associate Professor of Religion at Rutgers University, USA. He received the Lois Roth Prize for translations of Rumi's Masnavi and is author of The Biographical Tradition in Sufism (RoutledgeCurzon 2001).
Andrew Rippin is Professor of Islamic History at the University of Victoria, Canada, and a Fellow of the Royal Society of Canada. His books include Muslims: Their Religious Beliefs and Practices (4th edition, Routledge 2011).