About a year ago, I read Richard Rhodes’ Dark Sun, a very detailed and well-written book about the development of the hydrogen bomb. His The Making of the Atomic Bomb is excellent as well.
One paragraph especially stuck with me just for its mind-boggling magnitude:
During the war, Serber remembers, “On Edward Teller’s blackboard at Los Alamos, I once saw a list of weapons—ideas for weapons—with their abilities and properties displayed. For the last one on the list, the largest, the method of delivery was listed as ‘backyard.’ Since that particular design would probably kill everyone on Earth, there was no use carting it elsewhere.”

And here I was thinking you were talking about Dungeons and Dragons abandonware