- The Future of the Colored Race in America
- The Memorable Thoughts of Socrates
- A Lie Never Justifiable
- The Philosophy of Spinoza
- Rollo's Philosophy. [Air]
- Notes from the Underground
- Esprit des lois
- A Treatise Concerning the Principles of Human Knowledge
- A Essay Towards a New Theory of Vision
- Gorgias
- Kritik der reinen Vernunft
- Thus Spake Zarathustra
- Plato and Platonism
- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- Ainsi Parlait Zarathoustra
- The System of Nature, Volume 1
- Petty Troubles of Married Life, Second Part
- A Treatise of Human Nature
- The Republic
- Politics: A Treatise on Government
- The Critique of Practical Reason
- Among My Books
- Meno
- The Golden Sayings of Epictetus
- De veritate religionis Christianae. French
- Theaetetus
- Crito
- The Philosophy of the Moral Feelings
- Les Femmes de la Révolution
- Les femmes d'artistes
- Siouan Sociology
- Utilitarianism
- The Ego and His Own
- Essays of Schopenhauer
- Essays of Schopenhauer
- The Holy war, made by King Shaddai upon Diabolus, for the regaining of the metropolis of the world; ...
- Menexenus
- Ion
- Statesman
- Sophist
- 庄子的故事
- Entretien d’un père avec ses enfants
- How to Marry Well
- Ceci n'est pas un conte
- Searchlights on Health: Light on Dark Corners
- Quotes and Images From The Confessions of J. J. Rousseau
- The Unseen World and Other Essays
- A Domestic Problem : Work and Culture in the Household
- The Consolation of Philosophy
- Feuerbach: The roots of the socialist philosophy
- Lesser Hippias
- Auguste Comte and Positivism
- The Ethics of Aristotle
- The Existence of God
- Walden
- 呻吟语
- Plutarch's Morals
- Filosofía Fundamental, Tomo I
- The Destiny of Man
- The Map of Life
- Vindication of the Rights of Woman
- Book of Wise Sayings
- The Ethics of Drink and Other Social Questions
- Old-Fashioned Ethics and Common-Sense Metaphysics
- The Soul of Man under Socialism
- An Appeal in Favor of that Class of Americans Called Africans
- Study of a Woman
- Seekers after God
- Chinese Literature
- Lay Morals
- The Countess of Saint Geran
- Essays
- Philebus
- Ancient and Modern Celebrated Freethinkers
- Secret Societies
- Civil Disobedience
- Improvement of the Understanding
- The Young Woman's Guide
- Practical Essays
- An Enquiry Concerning Human Understanding
- The Child at Home
- Apology, Crito, and Phaedo of Socrates
- The Prince
- Discours de la méthode
- The Metaphysical Elements of Ethics
- The Friendships of Women
- The Critique of Pure Reason
- The Physiology of Marriage, Part 2
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- Shorter Prose Pieces
- Parmenides
- Phaedo
- Essays
- The Selections from the Principles of Philosophy
- An American Girl Abroad
- The Theological Tractates and The Consolation of Philosophy
- Poetics. English
- Laws
- Apology
- Another Study of Woman