This was a very good read. I got to page two hundred without realising and was put out to reach the end of the book.
I found some of the explanation of the science lacking. True, the author had to find the right balance of scientific detail but there were gaps. He mentions the separation of uranium isotopes by gaseous diffusion and explains the process, for example, but does not explain how it can be applied to an element that is a dense metal with a boiling point of over 4000 degrees Celsius. Quibbles, perhaps, but enough to nag away.
However, the real sand in the vaseline was the history, which is very much written from the perspective of the victor, perhaps with an eye to the US market. French research, for example, seems to end with the fall of France in May 1940. The epilogue takes us up to the Cuban missile crisis of 1963 but ignores the French research that led to their first nuclear test in 1960. Several pages are taken with an oblique justification of the use of the atomic bombs on Japan - including a contribution from one of his relatives - but only four lines (yes, four lines!) on the bombing of Nagasaki. No mention of Hiroshima being designated a World Heritage Site because of the bombing. The Nazi scientists are bumbling revisionists. The Soviets have spies everywhere. The Western Allies have no agents on the ground but work everything out through inspired inference and deduction. And so on...
A great read, definitely, but not good history.