It’s been a while since I read the book, so my review is a bit less detailed.
Long story short, I really like this take on superheroes and the beginning of the cold war. It felt like a complete book, but there’s a clear opportunity for sequels.
The heroes are of the “one exceptional trick” school of superhero, rather than each being a grab bag of awesome. There’s also a strong suggestion that there’s something… deliberate about the force that’s imbuing people with powers.
I do look forward to the sequels.