Skepticism: The Intelligent Way of Changing Your Perspective and Outlook on Life

Thus Spoke Zarathustra

Skeptical Thinking: How to See Life through the Eyes of Skeptics and Existentialists

A Rulebook for Arguments

Logically Fallacious: The Ultimate Collection of Over 300 Logical Fallacies (Academic Edition)

Philosophy: Understanding Skepticism, Stoicism, and Existentialism

On the Genealogy of Morality

Stoicism: Learning about Stoicism, Skepticism, and Existentialism

What Would Plato Think?: 200+ Philosophical Questions That Could Change Your Life

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

The Courage to Be

Existentialism: Nihilism and Rethinking Value Systems

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

The Color of Happiness

Being and Nothingness

Philosophers: The Greatest Philosophers and Thinkers of the World

Logic: A Very Short Introduction, 2nd Edition

The Logic of Scientific Discovery

Existentialism. Philosophical and Literary Works: Notes from Underground, Fear and Trembling, Ecce Homo, The Metamorphosis and others