- Study of a Woman
- Ethics — Part 4
- Letters on England
- 道德经
- Auguste Comte and Positivism
- The Physiology of Marriage, Part 2
- Walden
- Ethics — Part 5
- Book of Wise Sayings
- A Philosophical Dictionary, Volume 10
- Literary and Philosophical Essays: French, German and Italian
- Ethica. English
- The Destiny of Man
- A Philosophical Dictionary, Volume 4
- Critias
- The Soul of Man under Socialism
- Thoughts out of Season Part I
- Siouan Sociology
- Ethics — Part 2
- Secret Societies
- The Essays of Arthur Schopenhauer; Religion, a Dialogue, Etc.
- Feuerbach: The roots of the socialist philosophy
- Chinese Literature
- How to Marry Well
- Statesman
- Homer and Classical Philology
- Essays of Schopenhauer
- A Young Hero
- The Philosophy of the Moral Feelings
- The Map of Life
- The Consolation of Philosophy
- Utilitarianism
- Sophist
- The Memorable Thoughts of Socrates
- The Memorable Thoughts of Socrates
- The Ethics of Aristotle
- The Unseen World and Other Essays
- Ion
- Pedagogics as a System
- Quotes and Images From The Confessions of J. J. Rousseau
- Ethics — Part 1
- A Domestic Problem : Work and Culture in the Household
- A Essay Towards a New Theory of Vision
- Apology
- The Essays of Arthur Schopenhauer; Studies in Pessimism
- The Critique of Practical Reason
- A Philosophical Dictionary, Volume 1
- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- A Lie Never Justifiable
- The Philosophy of Spinoza
- Dialogues Concerning Natural Religion
- 鬼谷子
- The Ego and His Own
- Thus Spake Zarathustra
- Kritik der reinen Vernunft
- Notes from the Underground
- The Essays of Montaigne — Complete
- A Treatise of Human Nature
- Philosophical Letters of Frederich Schiller
- Crito
- The System of Nature, Volume 1
- The Golden Sayings of Epictetus
- De profundis
- Vaninka
- Politics: A Treatise on Government
- Categoriae. English
- 韩非子
- L'homme Qui Rit
- Aesthetical Essays of Frederich Schiller
- Improvement of the Understanding
- Apology, Crito, and Phaedo of Socrates
- The Prince
- Ethics — Part 3
- Practical Essays
- Fundamental Principles of the Metaphysic of Morals
- Ainsi Parlait Zarathoustra
- The Critique of Pure Reason
- Our Fathers Have Told Us
- The Republic
- The Young Woman's Guide
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- Civil Disobedience
- The Friendships of Women
- The Child at Home
- Ancient and Modern Celebrated Freethinkers
- An Enquiry Concerning Human Understanding
- The Metaphysical Elements of Ethics
- Träume eines Geistersehers, erläutert durch Träume der Metaphysik
- Essays
- A Treatise Concerning the Principles of Human Knowledge
- Selbstbetrachtungen
- Beyond Good and Evil
- The Existence of God
- A Selection from the Discourses of Epictetus with the Encheiridion
- Poetics. English
- The Philosophy of Evolution
- Another Study of Woman
- Laws
- Essays
- Shorter Prose Pieces