Top positive review
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Very detailed reference, and excellent reference of the engineering effort.
on August 5, 2015
This is by far the best reference for atomic bomb development in print. Other reviews detail that.
I might mention you will probably read each page of this with Google at hand, as well as any other reference you have. It does the job of connecting dots that other authors have not done.
Example: I have not read any other clear description of the structure of the gun type bomb. It isn't at all what you have in mind.
Significance of the "tamper" isn't clear in other references.
The engineering of the entire process becomes clear with this detail. Many other references cover the details, but this book allows you to understand the engineering by not leaving out all the details of such as the plutonium gun bomb (photos, for example) that was in development and dropped. That sort of "try anything in parallel" resulted in a lot of fits and starts, and you can figure them out from John's book in a very interesting fashion.