DAVID F. MARKS served as Head of the School of Psychology at Middlesex Polytechnic, and as Head of the Department of Psychology at City University, London, UK. Previously David held positions at the University of Sheffield, UK, and at the University of Otago, New Zealand. His other books include "The Psychology of the Psychic "(1980, with R. Kammann), "Theories of Image Formation "(1986), "Imagery: Current Developments "(1990, with J.T.E. Richardson and P. Hampson), "The Quit For Life Programme: An Easier Way to Stop Smoking and Not Start Again "(1993), "Improving the Health of the Nation "(19...