Unintended Consequences is out of print - therefore, it's gone up.
John Ross had a sequel planned, but he's also (as I recall) had a stroke - so back burner.
Might I suggest a primer in logic as well? Preferably symbolic logic - what that will do for you is allow to organise your thinking and synthesise a conclusion more rapidly than you do now (I audited a course in symbolic logic back in '86 - and I wish I'd taken it for credit! Enjoyable course, particularly for the mathematically-minded.)
Also, a primer in semantics - "The study of Meaning" - which will help you wade through the BS they're spouting in the press and start to see what they're really thinking (if you don't think their words are chosen carefully, then you're ready to buy both sides of the same acre in the Ozarks.)
Beginning studies in logic and sematics will do more for your thinking than anything else ever will! However...
Heinlein:
Starship Troopers
The Pragmatics of Patriotism
Who Are the Heirs of Patrick Henry?
Free Men
Farnham's Freehold
- And that's just the stuff off the top of my head that comes to mind. You can find excellent shorts and essays in Expanded Universe and The Past Through Tomorrow (more the former.)
Brave New World - Aldous Huxley (dystopian society)
Smoke Jumpers - Paul Freeman (political satire)
Watch Demolition Man - you'll find elements of both novels.
I believe 1984 and Animal Farm have already been mentioned.
Common Sense by Thomas Paine. Some socialism needs to be mixed in with the capitalism to make things work - aside from "critical services" (public safety, musea and libraries for the preservation of knowledge, culture, and science; universities for education) this is really all that's left. It's the system that was posited as a pension for the elderly and the aged, and was the foundation for the Social Security Act (before it got hopelessly corrupted.)
The Federalist Papers. Collected writings of Alexander Hamilton, James Madison, and John Jay. 1787-88. Written to persuade New York to accept the Constitution.
The Anti-Federalist Papers. Various anonymous authors. Retorts to The Federalist Papers.
That should get you started. Continue your researches from there. The "Silence Dogood" letters (Ben Franklin) also make for interesting reading.
In fact, nearly anything by Ben Franklin or Thomas Jefferson is good for kickstarting the little grey cells...