From my comment to my post Machanarchy:
“Incidentally, I see in David Miller’s lengthy review of the Machan/Long book on Amazon, he highly recommends Hasnas’s and Long’s contributions to the book, which are: John Hasnas, The Obviousness of Anarchy (2); and Roderick Long, Market Anarchism as Constitutionalism. These papers are really good.”
[Update: See also Hasnas: Common Law, Anarchy, etc.: Common Law Liberalism: A New Theory of the Libertarian Society]
Hasnas is also author of the fantastic paper The Myth of the Rule of Law.