Edward B. Lewis' science is the bridge linking experimental genetics as conducted in the first half of the 20th century, and the powerful molecular genetic approaches that revolutionized the field in its last quarter. His Nobel Prize winning studies founded the field of developmental genetics and laid the groundwork for our current understanding of the universal, evolutionarily conserved strategies controlling animal development. A lesser-known aspect of Lewis' canon is the pioneering studies he carried out on ionizing radiation and human cancer. In doing so, he was propelled into a public storm over nuclear weapons testing policy. For the first time Lewis' key publications in the fields of genetics, developmental biology, radiation and cancer are compiled within one volume. Howard Lipshitz, a close colleague of Lewis for 20 years, provides invaluable commentaries on the papers placing them in their scientific and historical context and, throughout, giving insight into Lewis' approach to science and the motivations that drove Lewis' choice of subject matter. This book will be invaluable to a wide audience of professionals in the life and biomedical sciences; including geneticists, developmental biologists, molecular biologists, radiation biologists and cancer researchers. It provides source material for advanced undergraduate and graduate level courses in genetics, developmental biology, radiation and cancer. In addition, historians of science will find it to be a valuable resource both because it contains original research publications and because of the illuminating commentary.