Whysner's book is a valuable addition to the history of toxicology and allied fields, as it benefits from the institutional knowledge of a professional working in the field of toxicology for five decades. The author brings to light technical aspects of the science that some may not be aware of, especially concepts of risk assessment, dose response, and links between cancer rates and the reality of the state of the science. –Dale A. Stirling, Consultant in Environmental & Public Health History and author of The Nanotechnology Revolution: A Global Bibliographic Perspective and A Bibliographic Guide to North American Industry: History, Health & Hazardous Waste