Gripping narration by Sam Kean of the scientists (and spies) of WW2 who obstructed the creation of the atomic bomb by Nazi Germany. Kean details the stories of a handful of prominent physicists and chemists involved in thwarting Nazi scientists from obtaining resources or information necessary to create the atomic bomb. After reading this book I gained a new appreciation for many well-known physicists who fought not only for their own lives but to keep secrets safe, as well as disdain for a couple selfish physicists. Kean does a great job narrating all of these individual stories and tying them together, as well as explaining necessary scientific material for anyone to understand. Highly recommend to those interested in science and/or WW2, specifically Nazi Germany.