[darjen]

I'd recommend reading some Murray Rothbard before anything by Milton Friedman or Rand. It's even free online here:

http://mises.org/rothbard/ethics/ethics.asp

[llimllib]

Rand is not a libertarian.

[psykotic]

And arguably neither is Rothbard, who is much closer in his view on ethics to Rand than to von Mises.