I specifically recommend:
brilliant overview of time preference especially how the state messes it up. also breif overview of Hoppe's "Argumentation Ethics".
his most controversial work. takes his analysis of time preference to some rather unexpected conclusions. worth a read just to cut through all the ad homs thrown his way.
very short work best read in conjunction or after HA. Will be expecially interesting to philosophy geeks and/or objectivists. He covers the epistomological basis of praxeology in further detail than Mises.
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