I would like to draw your attention to Wes Messamore's free e-book Learn About Liberty--a fantastic, short primer on the ideas of liberty. Wes is the editor and chief of The Humble Libertarian--where I am a contributor. His writing is clear, concise, and has been of great value to me. Please checkout his work and peruse his site.
Learn About Liberty begins:
Libertarianism is more inspiring, compelling, and interesting now than at any other time in human history. Our world truly faces a deepening and urgent moral crisis and its people are searching for an answer to the problems we face. Many of us wonder about the "obscure" philosophy of liberty and its adherents, the libertarians.
Who are libertarians and what do they believe? How do they propose to solve our world's problems? Where did libertarian ideas come from and when did they ever succeed? Why does it matter? Are libertarians a bunch of pie-in-the-sky idealists? Or are they reactionary cynics? Do they give humanity too much credit? Or are they all selfish, anti-social miscreants? (Read the rest and the entire e-book here.)