Enjoyed this. I knew very little about he logistics of the Manhattan Project, so this was a great background. I especially liked the Tube Alloy sections on the development of Uranium refinement. Some things I hadn't heard felt like they should be more widely known, such as the experiments on human subjects.
Because the author wanted to show a variety of women's stories, covering workers, housewives and more technical fields, there were a lot of characters in play, and I honestly couldn't keep all of them straight a lot of the time.
The writing wasn't amazing, as it had a lot of chirpiness and fluff, but it got the point across, I suppose.