Socrates, Buddha, Confucius, Jesus: From The Great Philosophers, Volume I

Way to Wisdom: An Introduction to Philosophy, Second Edition (Yale Nota Bene S)

Anaximander, Heraclitus, Parmenides, Plotinus, Laotzu, Nagarjuna (Harvest Book, Hb 288)

The World's Religions

Great Dialogues of Plato

A Brief Guide to Secret Religions