G.W.H. Lampe was Ely Professor of Divinity at Cambridge University and Canon of Ely Cathedral. He is author of The Seal of the Spirit, a major work on the theology of Baptism. D.M. MacKinnon was Norris-Hulse Professor of Divinity at Cambridge University and a Fellow of corpus Christi College, Cambridge. He is co-author of God, Sex and War, in the Adventures of Faith series.