Susannah Heschel is the Eli Black Professor and Chair of the Jewish Studies Program at Dartmouth College. She is the author of Abraham Geiger and the Jewish Jesus, The Aryan Jesus: Christian Theologians and the Bible in Nazi Germany, and Jüdischer Islam: Islam und jüdisch-deutsche Selbstbestimmung. She has held research grants from the Carnegie Foundation, the Ford Foundation, the National Humanities Center, the Guggenheim Foundation, and the Wissenschaftskolleg zu Berlin.

Umar Ryad is a Professor of Arabic and Islamic Studies at the University of Leuven and member of the Young Academy of Belgium. Previously, he has worked as an Assistant Professor at the University of Leiden (2008-2014) and as an Associate Professor at Utrecht University (2014-2017). He is currently leading a European Research Council (ERC) project which focuses on the "History of Muslims in Interwar Europe." His current research also includes the dynamics of the networks of pan-Islamist movements, Muslim polemics on Christianity, and transnational Islam in the modern world.