is a theologian who is probably best known for his two best-selling books on the Bible, Introducing the Old Testament and Introducing the New Testament. He studied in the University of Aberdeen where he was a student of I. Howard Marshall, and he holds a PhD from the University of Manchester, where his mentor was F. F. Bruce. His doctoral research focused on Gnosticism in relation to early Christian thought and practice. This interest in esoteric spirituality later became a bridge between his study of the Bible and his concern for Christian mission, with particular reference to cultural change and the emergence of New Spirituality.