The Free Market Reader
One of the best introductions to libertarian/free market thought and is "straightforward, logical, and fun."
What you will find here are one hundred plus short essays on every topic related to free-market economics, all from the years of the monthly publication of the Free Market, when Murray Rothbard was writing a regular column. You will also find articles by Mises, Block, Rockwell, Ron Paul, William Peterson, Lawrence Reed, Richard Ebeling, Hans Hoppe, and many more.
Topics include privatization, socialism around the world, economic history, debt and deficits, fiat money and exchange rates, trade and protectionism, Keynesianism, supply-side economics, and many other topics. It makes for great reading, one essay at a time. It is the sort of book you can dip into and out of very quickly, and gain a great deal of insight as you do.