This is a curates egg of a Bond book. Mostly because it's not really about Bond at all who only turns up two thirds of the way through. And it's odd because in some ways, it would've been a better story if this wasn't a Bond book at all, but just a standalone story Ian Fleming had written about the main character, Vivian, and her life.
Considering who wrote it and when, a Fleming coming of age story about a woman could've been a disaster, but its portrayal of some of the realities of life for young women in the 1950s rings sort of true, if a little one dimensional. Yes there are some dodgy sexual politics but that's the realities of the 1950s.
Anyway, it's an oddity that doesn't add anything to the James Bond canon, but is an interesting insight into Ian Fleming the author.