- How to Marry Well
- Novelas de Voltaire — Tomo Primero
- L'homme Qui Rit
- Categoriae. English
- Laws
- The Prince
- Another Study of Woman
- The Critique of Pure Reason
- Essays of Schopenhauer
- Fundamental Principles of the Metaphysic of Morals
- The Golden Sayings of Epictetus
- La monadologie (1909)
- A Historical Survey of the Customs, Habits, & Present State of the Gypsies
- Philosophie de la Liberté (Tome I)
- The Metaphysical Elements of Ethics
- Ancient and Modern Celebrated Freethinkers
- The Map of Life
- Discours de la méthode
- Essays Æsthetical
- Civil Disobedience
- Utilitarianism
- The Republic
- Ethics — Part 2
- The Soul of Man under Socialism
- Thoughts out of Season Part I
- Filosofía Fundamental, Tomo I
- American Woman's Home
- The Essays of Montaigne — Complete
- Filosofía Fundamental, Tomo II
- The Essays of Arthur Schopenhauer; Religion, a Dialogue, Etc.
- Secret Societies
- Thus Spake Zarathustra
- Thus Spake Zarathustra
- Book of Wise Sayings
- Feuerbach: The roots of the socialist philosophy
- Advice to a Young Man upon First Going to Oxford
- Chinese Literature
- Seekers after God
- Littérature et Philosophie mêlées
- A Treatise of Human Nature
- No Compromise with Slavery
- An American Girl Abroad
- Autour de la table
- A Essay Towards a New Theory of Vision
- A Philosophical Dictionary, Volume 4
- Searchlights on Health: Light on Dark Corners
- Letters on England
- Ethics — Part 1
- Politics: A Treatise on Government
- 论语
- Le positivisme anglais
- The Destiny of Man
- Réflexions ou sentences et maximes morales
- Ethica. English
- Vaninka
- Regrets sur ma vieille robe de chambre
- Apology
- The Critique of Practical Reason
- The Physiology of Marriage, Part 2
- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- Dialogues Concerning Natural Religion
- Petty Troubles of Married Life, Second Part
- Ethics — Part 5
- A Philosophical Dictionary, Volume 1
- The Existence of God
- Modern Women and What is Said of Them
- The Memorable Thoughts of Socrates
- The Ego and His Own
- Native Races and the War
- A Lie Never Justifiable
- An Essay on the Principle of Population
- The Symposium
- The Future of the Colored Race in America
- The Cannibal Islands
- The Preface to Aristotle's Art of Poetry
- Esprit des lois
- Slavery Ordained of God
- Notes from the Underground
- The Selections from the Principles of Philosophy
- The Unseen World and Other Essays
- A Treatise Concerning the Principles of Human Knowledge
- Lessons in Life, for All Who Will Read Them
- Essays
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- The Consolation of Philosophy
- Beyond Good and Evil
- A Philosophical Dictionary, Volume 10
- Essays
- Poetics. English
- Ethics — Part 4
- The Ethics of Aristotle
- A Selection from the Discourses of Epictetus with the Encheiridion
- Ethics — Part 3
- Catherine De Medici