This book is designed to be a thorough introduction for physicians entering the occupational and environmental medicine field, whether preparing for specialty examinations or moving into the field from other medical specialties or from primary care. It also serves as a convenient guide and reference for nurses, health professionals, and those outside of health care who need a quick orientation. The book is written with a strong and coherent point of view about the value of occupational and environmental medicine and commitment to ethical, worker-centered practice. It is unusual in the depth of its coverage; its inclusion of important topics that are usually overlooked in textbooks of the field, such as risk science; its emphasis on good management of occupational health services; and its thorough integration of material that fits topics together rather than presenting them as if they were separate and unrelated.