- The Prince
- Pedagogics as a System
- Another Study of Woman
- Essays Æsthetical
- Reflections; or Sentences and Moral Maxims
- Laws
- Civil Disobedience
- The Unseen World and Other Essays
- The Republic
- Our Fathers Have Told Us
- Beyond Good and Evil
- How to Marry Well
- Secret Societies
- Thus Spake Zarathustra
- Utilitarianism
- Slavery Ordained of God
- The Symposium
- The Ethnology of the British Islands
- A Treatise of Human Nature
- American Woman's Home
- The Essays of Montaigne — Complete
- Essays of Schopenhauer
- Improvement of the Understanding
- The Philosophy of the Conditioned
- Book of Wise Sayings
- Chinese Literature
- Apology
- The Caxtons — Volume 16
- Study of a Woman
- Modern Women and What is Said of Them
- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- The Physiology of Marriage, Part 2
- An American Girl Abroad
- No Compromise with Slavery
- No Compromise with Slavery
- Politics: A Treatise on Government
- The Dark House
- A Lie Never Justifiable
- The Critique of Practical Reason
- Vaninka
- The Existence of God
- A Philosophical Dictionary, Volume 1
- The Friendships of Women
- A Treatise Concerning the Principles of Human Knowledge
- An Enquiry Concerning Human Understanding
- Essays
- The Selections from the Principles of Philosophy
- The Young Woman's Guide
- Essays
- Poetics. English
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- Apology, Crito, and Phaedo of Socrates
- L'homme Qui Rit
- Old-Fashioned Ethics and Common-Sense Metaphysics
- A Selection from the Discourses of Epictetus with the Encheiridion
- Seekers after God
- Letters to His Son on the Art of Becoming a Man of the World and a Gentleman, 1751
- Bits about Home Matters
- Discourse of the Life and Character of the Hon. Littleton Waller Tazewell
- The Golden Sayings of Epictetus
- The Soul of Man under Socialism
- In Praise of Folly
- An Appeal in Favor of that Class of Americans Called Africans
- A Philological Essay Concerning the Pygmies of the Ancients
- The Metaphysical Elements of Ethics
- Manners, Customs, and Dress During the Middle Ages and During the Renaissance Period
- Marquise Brinvillier
- Ancient and Modern Celebrated Freethinkers
- The Map of Life
- History, Manners, and Customs of the North American Indians
- Feuerbach: The roots of the socialist philosophy
- A Reply to Dr. Lightfoot's Essays
- The Critique of Pure Reason
- Some Private Views
- Myths and myth-makers
- The Destiny of Man
- Ethics — Part 1
- A Essay Towards a New Theory of Vision
- Plutarch's Morals
- Marquise De Ganges
- An Essay on the Principle of Population
- A Philosophical Dictionary, Volume 4
- Quotes and Images From The Confessions of J. J. Rousseau
- An Enquiry Concerning the Principles of Taste, and of the Origin of our Ideas of Beauty, etc.
- Folk Lore
- The Memorable Thoughts of Socrates
- Searchlights on Health: Light on Dark Corners
- Philosophical Letters of Frederich Schiller
- Ethics — Part 2
- Rollo's Philosophy. [Air]
- A Domestic Problem : Work and Culture in the Household
- The Consolation of Philosophy
- Dialogues Concerning Natural Religion
- Notes from the Underground
- The Philosophy of the Moral Feelings
- Esprit des lois
- The Philosophy of Spinoza
- Siouan Sociology
- Probabilities : An aid to Faith
- A Young Hero