Environment and Cancer: A Collection of Pafiers Presented at the Twenty-fourth Annual Symposium on Fundamental Cancer Research 1971. Baltimore: Williams & Wilkins. 1972. Pp. xiv+475. $19. This book represents a collection of the papers presented at the 1971 Annual Symposium on Fundamental Cancer Research at the M. D. Anderson Hospital and Tumour Institute at Houston, Texas. In common with reports of previous symposia at this Institute, this volume includes excellent scientific contributions by leading workers in the subject. These range through studies on environmental hazards, genetic and biochemical characterization of the carcinogenic events and consideration of some of the host-dependent factors. Because this volume is a record of a meeting of experts in a specialized field, it is also most appropriate as such for a similar reader. It does not make light reading for the non-specialist, but does contain much of interest to anyone concerned with an informed interest in the problems of carcinogenesis. There is little of direct relationship to cancer of the respiratory tract apart from an excellent chapter by Wynder and Hoffmann on ‘Carcinogens in the Air’. This provides a very good review of the subject which is well worth reading. N.M.