[esspem]

1) If you like Atlas Shrugged, then maybe you will like "For a new liberty" by Murray Rothbard (the founder of anarcho-capitalism movement): http://mises.org/rothbard/newlibertywhole.asp

That's a deduction of libertarian principles from non-aggression axiom and application of that principles to current problems.

2) If you are interested in philosophy, then read "History of Western Philosophy" by Bertrand Russel. Unfortunately It's written from the socialists point of view, but if you ignore Russels' left views, it's an excellent introduction to the history of philosophy.