Economics in One Lesson is an excellent intro into free market economics. The book, written by Henry Hazlitt, is largely based on the writings of Frederic Bastiat. Bastiat’s Essays on Political Economy were brought to a more modern light with Hazlitt’s work, but you will see that the economic principle remains the same.
The following are interviews with various modern free market economists who summarize various chapters and concepts within the book. We highly recommend the book itself, but these videos do an excellent job of presenting the information.