Mises Institute has a lot of great material related to Austrian economics.

I haven't read all of them but the following are commonly recommended books from the Austrian school of economics:

Henry Hazlitt

•Economics in One LessonEugen Von

Eugen von Böhm-Bawerk

•The Positive Theory of Capital

Carl Menger

•Origins of Money

•Principles of Economics

F. A. Hayek

•Choice in Currency

•Individualism and Economic Order

•Use of Knowledge in Society

Ludwig Von Mises

•Human Action

•Theory of Money and Credit

Murray Rothbard

•What Has Government Done To Our Money?

•Man, Economy and State