Hi, I'm not sure if this really fits here but I am looking at getting some books and I was wondering if they were all historically sound/trustworthy/reputable.
George Marshall: Defender of the Republic by David Roll
The Marshall Plan: Dawn of the Cold War by Benn Steil
Guns, Germs, and Steel: The Fates of Human Societies by Jared Diamond
Upheaval: Turning Points for Nations in Crisis by Jared Diamond