Isabel Clarke is a consultant clinical psychologist, working in acute mental health in the NHS. She publishes and talks on the psychology of spirituality, and has always had a deep interest in ecology. She has been active in Greenspirit for many years. Her recent book, Madness, Mystery and the Survival of God (2008) brings together these themes in an accessible form. See her website: www.isabelclarke.org for more information on her publications and activities.