'This masterful summary of food safety science and policy is valuable for scholars, students, and concerned citizens. Since 1906, the focus of policy has shifted from addressing gross adulteration to invisible chemical and microbiological hazards that affect both public health and public confidence in the food supply. The authors give a concise survey of what is known about these risks and explain how to use risk analysis to set priorities and use resources more cost-effectively.' Lester Lave, Carnegie Mellon Tepper School, Carnegie Mellon University