Critical Thinking: Skills to Contemplate Life, Nature, the Human Race, and More

The Republic: Plato

Skeptical Thinking: Understanding Stoicism, Existentialism, and Other Philosophies in Life

The Virtue of Selfishness: A New Concept of Egoism

Philosophers: The Philosophies of the Greatest Thinkers in History

Until the End of Time: Mind, Matter, and Our Search for Meaning in an Evolving Universe

Right and Wrong

The History of Philosophy: Thoughts from Existentialism, Stoicism, and Skepticism

Aristotle's Children: How Christian, Muslims and Jews Rediscovered Ancient Wisdom and Illuminated the Dark Ages

Existentialism: Figuring out the Meaning of Life and Ethics with the Great Philosophers

An Essay Concerning Human Understanding

Skepticism: The Stoic, the Skeptic, and the Existentialist Thinkers of the World

Language, Truth and Logic

Stoicism: Learning about Stoicism, Skepticism, and Existentialism

The Book of Eels: Our Enduring Fascination with the Most Mysterious Creature in the Natural World

How We Think – Audiobook: How We Think: John Dewey's Exploration of Thought Processes

Existentialist Thinking: Skepticism and Existentialism Explained in Detail

A Theologico-Political Treatise/A Political Treatise

Ethics (Complete)

A Discourse Upon The Origin And The Foundation Of The Inequality Among Mankind