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

Thus Spoke Zarathustra

The Republic: Plato

Philosophy: Skeptical and Existential Thinkers from the Past

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

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

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

On the Genealogy of Morality

The Virtue of Selfishness: A New Concept of Egoism

Philosophers: The Greatest Philosophers and Thinkers of the World

The Courage to Be

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

The Color of Happiness

Stoicism: Learning about Stoicism, Skepticism, and Existentialism

Being and Nothingness

Existentialist Thinking: Skepticism and Existentialism Explained in Detail

Right and Wrong

An Essay Concerning Human Understanding

Language, Truth and Logic

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