Good point and funny you mention that.
A couple days ago I saw a very short video (1 minute plus) segment where Peter Robinson asked Dr. Sowell about how he went from a high school dropout to a Harvard graduate in so few years.
Dr. Sowell didn’t go into it and was very modest about it.
His first biography is well worth reading. I haven’t read his second one yet but I hope to do so this next year.
Much like Forrest McDonald in the field of history, Sowell does not take conventional thought down a false path. His early work in economics taught him that research should be independent and based in true investigation of empirical evidence.