Thijl Sunier is Professor of Anthropology at VU University Amsterdam, Netherlands. He specializes in Islam in Europe, transnational religious activism, and religious authority. He conducted research among Turkish youth in France, Germany, Great Britain and the Netherlands, research on nation-building and multiculturalism in France and The Netherlands, and research on Islamic community building and religious authority.

Nico Landman is Associate Professor of Islamic Studies and Coordinator of Religious Studies at Utrecht University, Netherlands. His research focus is on the institutionalisation of Islam in Western Europe.