Paul Helm is Emeritus Professor of the History and Philosophy of Religion at King's College, London, UK. He has also taught at Regent College, Vancouver; Highland Theological College, Scotland; and the University of Liverpool, UK.

Oliver D. Crisp is Principal of St Mary's College and Head of the School of Divinity, University of St Andrews, UK.

Daniel J. Hill is Senior Lecturer in the Department of Philosophy, University of Liverpool, UK, and is the Chair of the Tyndale Fellowship's Study Group in Philosophy of Religion.