David Westerlund is Associate Professor at the Department of Comparative Religion, Stockholm University, and Senior Lecturer in the History of Religions at the Faculty of Theology, Uppsala University. His main scholarly interests are indigenous African religions and Islam in Africa, religion and politics, Sufism in Europe and inter-religious relations, particularly between Christians and Muslims. Ingvar Svanberg is an ethnologist and Senior Research Fellow at the Department of East European Studies, Uppsala University. His research interests include Central Asian culture, religion and history, ethnobiology and minority issues, particularly concerning Muslims. He has written numerous books and articles on a wide range of topics.