This compelling and comprehensive biography of Oppenheimer rewards the reader with a story rich in detail and excitement as it examines the life, relationships, and work of an American genius. Oppenheimer was a particularly complex man who could be generous and charming but could also be arrogant and insensitive. The authors make use of material gathered over a period of 25 years, including interviews with key characters in Oppenheimer’s life, many now deceased, previously secret FBI files, and correspondence heretofore unavailable. The book is populated by a richly presented, fascinating cast of characters. From the secret culture of Los Alamos to the post-World War II period in which right-wing America believed in massive nuclear retaliation as defense policy, the reader is swept into the McCarthyite anti-Communist craze, which ultimately led to the destruction of Oppenheimer’s reputation as well as those of many other scientists and intellectuals.