Primer: 1. An elementary textbook, A book that covers the basic elements of any subject. (from Medieval Latin primarium "basic handbook"); 2. A small amount of explosive used to detonate the main explosive charge. American Heritage Dictionary, 1979.
Liberty is not just for Fourth of July speeches. Liberty is the fundamental question of all human relations and morality. There is a wealth of information and ideas about liberty, but it is spread among many sources.
Read Alan Burris' A Liberty Primer for an excellent introduction to the philosophy of libertarianism.