Alister E. McGrath is Professor of Historical Theology at Oxford University. He is one of the worlds leading Protestant theologians and the author of numerous popular theology textbooks, including Christian Theology (Third Edition, 2001), The Christian Theology Reader, (Second Edition, 2001), Christian Spirituality (1999), Science and Religion (1998), Historical Theology (1998), and An Introduction to Christianity (1997), all available from Blackwell Publishing. He is also editor of The Blackwell Companion to Protestantism (2003).