I found 2 good books at a used book store, A Pilot's Story, by Noah Thompson, put out by Academy Books, about a B-17 pilot, his training, WW2 over Germany, and later flying MATs and the Berlin airlift.
They Also Flew, by Lee Arbon, put out by Smithsonian Press, about USAAF enlisted pilots, 1912-1942.
Both together didn't cost me $20.00.