- An Essay concerning Human Understanding by John Locke
- The Defendant (essays) by G.K. Chesterton
- Emile, or Education by Jean-Jacques Rousseau
- Strength To Love (sermons) by Martin Luther King, Jr.
- The Social Contract by Jean-Jacques Rousseau
- An Inquiry Into the Nature and Causes of the Wealth of Nations by Adam Smith
These books are derived from freely available texts which are public domain in most countries.
Scientia pigeon est