- The Dark House
- Book of Wise Sayings
- Modern Women and What is Said of Them
- The Destiny of Man
- The Child at Home
- Utilitarianism
- Plutarch's Morals
- Secret Societies
- Siouan Sociology
- Searchlights on Health: Light on Dark Corners
- The Philosophy of the Moral Feelings
- Les Femmes de la Révolution
- The Young Woman's Guide
- Auguste Comte and Positivism
- Feuerbach: The roots of the socialist philosophy
- Advice to a Young Man upon First Going to Oxford
- Phaedrus
- Vindication of the Rights of Woman
- American Woman's Home
- Categoriae. English
- Study of a Woman
- Chinese Literature
- Improvement of the Understanding
- No Compromise with Slavery
- Myths and myth-makers
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- Bits about Home Matters
- Poetics. English
- Plato and Platonism
- The System of Nature, Volume 2
- Filosofía Fundamental, Tomo IV
- Backlog Studies
- The Prince
- Apology, Crito, and Phaedo of Socrates
- Apology, Crito, and Phaedo of Socrates
- Fundamental Principles of the Metaphysic of Morals
- Another Study of Woman
- Civil Disobedience
- The Republic
- Practical Essays
- Essays
- A Philosophical Dictionary, Volume 10
- The Existence of God
- The Mechanism of the Human Voice
- Laws
- Beyond Good and Evil
- The Friendships of Women
- An American Girl Abroad
- The Selections from the Principles of Philosophy
- A Treatise Concerning the Principles of Human Knowledge
- Euthydemus
- Novelas de Voltaire — Tomo Primero
- An Essay on the Principle of Population
- The Philosophy of Evolution
- The Ego and His Own
- The Ruins, or, Meditation on the Revolutions of Empires and the Law of Nature
- The Uncollected Writings of Thomas de Quincey—Vol. 1
- A Philosophical Dictionary, Volume 1
- El Criterio
- Apology
- Phaedo
- Essays
- An Enquiry Concerning Human Understanding
- Filosofía Fundamental, Tomo II
- A Essay Towards a New Theory of Vision
- Probabilities : An aid to Faith
- A Young Hero
- Social Rights and Duties, Volume I (of 2)
- Manners, Customs, and Dress During the Middle Ages and During the Renaissance Period
- Philebus
- The Golden Sayings of Epictetus
- Ancient and Modern Celebrated Freethinkers
- Summa Theologica, Part II-II (Secunda Secundae)
- Seekers after God
- Crito
- The Critique of Practical Reason
- Politics: A Treatise on Government
- The Metaphysical Elements of Ethics
- Thus Spake Zarathustra
- The Critique of Pure Reason
- L'homme Qui Rit
- Theologico-Political Treatise — Part 4
- A Treatise of Human Nature
- The Map of Life
- Homer and Classical Philology
- La monadologie (1909)
- Pedagogics as a System
- The Unseen World and Other Essays
- How to Marry Well
- Notes from the Underground
- The Philosophy of Spinoza
- The Soul of Man under Socialism
- The Ethics of Aristotle
- The Memorable Thoughts of Socrates
- Dialogues Concerning Natural Religion
- Complete Works of Plutarch — Volume 3: Essays and Miscellanies
- A Domestic Problem : Work and Culture in the Household
- The Consolation of Philosophy
- Ethics — Part 1
- Rollo's Philosophy. [Air]