William K Kay, Ph.D. (1981) Education, Reading University, and PhD (1989) in Theology, Nottingham University, is Professor of Theology at Glyndŵr University, Wrexham, Wales. He has published extensively on educational and Pentecostal topics including Pentecostalism: a very short introduction (Oxford University Press, 2011).Anne E Dyer Ph.D. (2008) in Theology, Bangor University, N Wales, is the senior Librarian and a tutor at Mattersey Hall, a ministry training centre (BA-PhD) for the Assemblies of God in the UK. Her specialities are history of Pentecostalism and Christian Mission. She has been assistant to Professor W. K. Kay since 2003 in research and editing books and the Journal of European Pentecostal Association, for which she is secretary.