Douglas Pratt, FRAS, FRHistS, PhD 1984, University of St Andrews; DTheol 2009, Melbourne College of Divinity, is an Honorary Professor in Theological and Religious Studies at the University of Auckland, New Zealand, and holds honorary research positions elsewhere. Recent publications include Christian Engagement with Islam: Ecumenical Journeys since 1910 (Leiden, 2017) and The Challenge of Islam. Encounters in Interfaith Dialogue (Abingdon, 2017).Charles Tieszen, FRHistS, PhD 2010, University of Birmingham, is an Adjunct Professor for Islamic studies and Christian-Muslim relations at Fuller Theological Seminary. He has recently published Cross Veneration in the Medieval Islamic World (London, 2017) and edited Theological Issues in Christian-Muslim Dialogue (Eugene OR, 2018).