- A Domestic Problem : Work and Culture in the Household
- Walden
- The Soul of Man under Socialism
- A Philosophical Dictionary, Volume 10
- Feuerbach: The roots of the socialist philosophy
- Auguste Comte and Positivism
- The Existence of God
- Sophist
- An American Girl Abroad
- Study of a Woman
- The Ethics of Aristotle
- Old-Fashioned Ethics and Common-Sense Metaphysics
- Myths and myth-makers
- The Destiny of Man
- Fundamental Principles of the Metaphysic of Morals
- Book of Wise Sayings
- Homer and Classical Philology
- Searchlights on Health: Light on Dark Corners
- The Map of Life
- The Critique of Pure Reason
- The Holy war, made by King Shaddai upon Diabolus, for the regaining of the metropolis of the world; ...
- Ethica. English
- The Physiology of Marriage, Part 2
- Ancient and Modern Celebrated Freethinkers
- Philebus
- The Dark House
- A Young Hero
- The Philosophy of the Moral Feelings
- Utilitarianism
- The Metaphysical Elements of Ethics
- The Consolation of Philosophy
- The Golden Sayings of Epictetus
- Quotes and Images From The Confessions of J. J. Rousseau
- Improvement of the Understanding
- Improvement of the Understanding
- Seekers after God
- The Ethics of Drink and Other Social Questions
- The Home
- Statesman
- Lessons in Life, for All Who Will Read Them
- Notes from the Underground
- Dialogues Concerning Natural Religion
- The Philosophy of Spinoza
- A Philosophical Dictionary, Volume 4
- The Three Brides
- Thus Spake Zarathustra
- The Indolence of the Filipino
- The Mechanism of the Human Voice
- Gorgias
- The Memorable Thoughts of Socrates
- The Physical Life of Woman:
- The Unseen World and Other Essays
- Vaninka
- The Critique of Practical Reason
- A Treatise of Human Nature
- Politics: A Treatise on Government
- Ethics — Part 1
- Poetics. English
- Apology
- Another Study of Woman
- How to Marry Well
- Categoriae. English
- A Philosophical Dictionary, Volume 1
- Ainsi Parlait Zarathoustra
- The Ego and His Own
- Essays of Schopenhauer
- A Essay Towards a New Theory of Vision
- Secret Societies
- Essays
- The Young Woman's Guide
- Beyond Good and Evil
- The Countess of Saint Geran
- Our Fathers Have Told Us
- Phaedo
- The Cannibal Islands
- Thoughts out of Season Part I
- The Philosophy of Evolution
- Ethics — Part 3
- The Selections from the Principles of Philosophy
- L'homme Qui Rit
- Laws
- Essays
- Shorter Prose Pieces
- Advice to a Young Man upon First Going to Oxford
- The Prince
- Chinese Literature
- Apology, Crito, and Phaedo of Socrates
- Ethics — Part 4
- A Selection from the Discourses of Epictetus with the Encheiridion
- Letters on England
- Euthydemus
- A Lie Never Justifiable
- Civil Disobedience
- The Republic
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- L’Ingénu
- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- Plato and Platonism
- What is Property?
- An Enquiry Concerning Human Understanding