Josef van Ess, Emeritus Professor of Islamic Studies and Semitic Languages, University of Tübingen, Germany, has published widely on the history of the Islamic World; Islamic theology and philosophy, especially with respect to the formative period (8th-10th centuries) and the age of the Mongol conquests (13th-14th centuries); and Islamic mysticism. His most famous work is Theologie und Gesellschaft in 6 volumes (de Gruyter 1991-97), the first four volumes of which are now being published in English by Brill.

Gwendolin Goldbloom (1969) has produced English translations of several books and a number of articles in the field of Islamic Studies, most of them originally published in German.