The book describes the lives of the people who gave Stalin his weapon — scientists, engineers, managers, and prisoners during the early post war years from 1945–1953. Many anecdotes and vicissitudes of life at that time in the Soviet Union accompany considerable technical information regarding the solutions to formidable problems of nuclear weapons development. The contents should interest the reader who wants to learn more about this part of the history and politics in 20th century physics. The prevention of nuclear proliferation is a topic of current interest, and the procedure followed by the Soviet Union as described in this book will help to understand the complexities involved. Readership: Students, researchers, and general readers interested in physics and history of science.