Being a former B-17 8th Air Force bomber pilot, the author does know his stuff and how to portray flying a B-17. But the story of Aces is rather flat.
You take two hometown friends, they fall in love with flying, and each others girl friends, and decide to enlist and become pilots. They both end up in the same unit of the 8th in the UK. Lots of things happen, but you hardly feel 'connected' to them.
The author plays with the historical timeline, and mixes the Me-262 and the Wasserfall missiles with our main characters. How these things evolve is shown by following historical persons like Galland, Hitler, Göring, Speer, Eisenhower, and more, adding a German fighter jock.
It is not a bad book, but it misses 'the touch' to draw you in.