Just finished Skousen's "The Five Thousand Year Leap". Written in 1981, is as truthful and insightful now as it would have been when it was first published. Probably more so, if I'm honest.
If you've ever wondered what inspired the US constitution and the founding fathers in writing it, it's a great read. Not to mention, it paints (if you're able to analyze current and recent history) a rather horrifying picture of just how far from the original plan for peace, prosperity, and happiness this country has wandered...