Existentialism
A Beginner's Guide: The Essentials of Existential Philosophy
The Concept of Anxiety
A Simple Psychologically Oriented Deliberation in View of the Dogmatic Problem of Hereditary Sin
The Philosophy Collection
Meditations; The Book of Five Rings; Self Reliance; Beyond Good and Evil; Fear and Trembling; The Art of War; The Enchiridion & Discourses; The Analects of Confucius; The Republic; On the Nature of Things; & Letters from a Stoic
Marcus Aurelius,
Miyamoto Musashi,
Ralph Waldo Emerson,
Friedrich Nietzsche,
Søren Kierkegaard,
Sun Tzu,
Epictetus,
Confucius,
Plato,
Lucretius,
Seneca