Originally Posted by Dude
If he's already disenchanted by the history offerings in school, this may be right up his alley: Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong

It's largely a criticism of US History textbooks, but it gives good, in-depth coverage of the topics it selects.
To understand the perspective of the author, James W. Loewen, I suggest reading the Editorial Reviews of the book on Amazon and noting that customers who bought the book also bought history books by Howard Zinn and Oliver Stone.