Common Sense

Thoughts on Art and Life by Leonardo da Vinci

Self-Development and the Way to Power

Human, All Too Human: A Book for Free Spirits

Myths and Legends of All Nations / Famous Stories from the Greek, German, English, Spanish, / Scandinavian, Danish, French, Russian, Bohemian, Italian / and other sources

The Origin of Species by means of Natural Selection, 6th Edition

The Antichrist

Three Contributions to the Theory of Sex

Studies in the Psychology of Sex, Volume 5 / Erotic Symbolism; The Mechanism of Detumescence; The Psychic State in Pregnancy

Leviathan

It's Complicated: The Social Lives of Networked Teens