For all her faults, I would still start with two short essays from CAPITALISM: The Unknown Ideal.
"Man's Rights" and "The Nature of Government".
While very short essays, those are two of her best essays in my opinion. Great for beginners.
You can find the book here http://www.amazon.com/Capitalism-Ideal-Ayn-Rand/dp/0451147952
Getting the individualist moral foundation down is perhaps the best beginning one can have.
Understanding the "big picture" in politics and economics and the wisdom of Ron Paul---- that can come later in time.
In Peace & Liberty,
Yes, please BUY this wonderful libertarian BOOK! We all must know the History of Freedom! Buy it today!
"The System of Liberty: Themes in the History of Classical Liberalism" ...by author George Smith --
Buy it Here: http://www.amazon.com/dp/05211820