Martyn Percy writes and teaches on ministry and mission in the contemporary Church. He was Principal of Ripon College, Cuddesdon, before being appointed Dean of Christ Church, Oxford, in 2014. Since 2004, he has been a member of the Faculty of Theology and Religion at King's College, London. His work is the subject of a recent study, Reasonable Radical? Reading the writings of Martyn Percy (edited by Ian S. Markham and Joshua Daniel, Pickwick, 2018). Associate Editors: Ian Markham is Dean and President of Virginia Theological Seminary and Priest Associate at St Paul's Episcopal Church in Alexandria, Virginia. Ian has published books on pastoral and practical theology and on Christian-Muslim dialogue. Emma Percy is Chaplain, Fellow and Welfare Dean at Trinity College, Oxford. She writes on practical and pastoral theology and concepts of ministry. Francesca Po is a scholar of religion, educated at the University of Oxford. Previously, she was a high-school teacher and minister, and served with the Peace Corps in Kazakhstan.