Unfortunately it doesn't get as technical as I would like it to -- that's historians for you -- and even introductory nuclear physics books. But it does actually describe the tools and operating conditions more precisely than most of my nuclear physics books, actual experimental runs (not to our standards, but again -- not bad).
What actually interested me most (and often does in historical biographies) is kind of "who were those guys, how did they hold their mouths while doing whatever it was they did".
What made them tick. How did they deal with the inevitable problems that arose. In other history -- why was Churchill in the right place and time for England, and why was Eisenhower the same for us. Remarkable men have a lot to teach us.
Because, remember, these were guys who really changed the planet. Yes, it was a little easier to discover something new then, but....they are the ones who did it in those times.
And those things don't change much. If we learn how to walk and chew gum as they did -- we'll do well in these times too, I believe.