If you enjoy reading, or want to get a better understanding of how the different freedoms fit together and are required by the Constitution, then read The Revolution. If you don't have much time and really want to know his position on a particular issue, then read Liberty Defined (50 different issues are discussed, each in its own small chapter). Ideally you would read both. After that, read End the Fed so you can understand the critical issue of monetary policy in more depth.