Bomb: The Race to Build- and Steal- the World's Most Dangerous Weapon

From Goodreads:

In December of 1938, a chemist in a German laboratory made a shocking discovery: When placed next to radioactive material, a Uranium atom split in two. That simple discovery launched a scientific race that spanned 3 continents. In Great Britain and the United States, Soviet spies worked their way into the scientific community; in Norway, a commando force slipped behind enemy lines to attack German heavy-water manufacturing; and deep in the desert, one brilliant group of scientists was hidden away at a remote site at Los Alamos. This is the story of the plotting, the risk-taking, the deceit, and genius that created the world's most formidable weapon. This is the story of the atomic bomb.

The timing of this book becoming available was kind of funny since I'm also in the middle of American Prometheus, a biography of J. Robert Oppenheimer. 

This book is so fantastically well researched and written. It makes the subject matter a bit more palatable but I still found myself fairly emotional when Sheinkin got to the bombing of Hiroshima. It's a horrifying period in our national history and the epilogue, which discusses the consequences of using today's significantly more powerful atomic weapons, was quite sobering. 

That being said, it's one of the best nonfiction books I've read in a long time.