Although the World War II efforts to develop nuclear weapons have inspired a very large literature, it struck us as noteworthy that virtually nothing existed in the form of firsthand accounts. Now It Can Be Told, by General Leslie Groves, the Manhattan Project's military commander, is probably the most prominent exception, but the scientists themselves seem to have shown little interest in publishing their reminiscences. Believing that it would be not only worthwhile for posterity, but ex tremely interesting for the present generation to hear about the aspirations, fears, and activities of...