- Walden
- Critias
- Auguste Comte and Positivism
- The Existence of God
- Feuerbach: The roots of the socialist philosophy
- The Soul of Man under Socialism
- The Heart of the New Thought
- Ethica. English
- Liberalism
- Aphorismes sur la sagesse dans la vie
- Laches
- Lysis
- Book of Wise Sayings
- Fundamental Principles of the Metaphysic of Morals
- Homer and Classical Philology
- The Essays of Arthur Schopenhauer; Religion, a Dialogue, Etc.
- L'homme Qui Rit
- Littérature et Philosophie mêlées
- Charmides
- Chinese Literature
- The Philosophy of the Moral Feelings
- Crito
- The Golden Sayings of Epictetus
- Theaetetus
- Utilitarianism
- Ethics — Part 2
- Cratylus
- Meno
- Thoughts out of Season Part I
- Essays of Schopenhauer
- The Ego and His Own
- Sophist
- Menexenus
- Statesman
- Statesman
- Protagoras
- Quotes and Images From The Confessions of J. J. Rousseau
- The Unseen World and Other Essays
- On Being Human
- The Essays of Arthur Schopenhauer; Studies in Pessimism
- Ion
- The Consolation of Philosophy
- The Ethics of Aristotle
- Ethics — Part 1
- Philosophical Letters of Frederich Schiller
- The Philosophy of Spinoza
- Dialogues Concerning Natural Religion
- A Treatise Concerning the Principles of Human Knowledge
- The Memorable Thoughts of Socrates
- Träume eines Geistersehers, erläutert durch Träume der Metaphysik
- A Essay Towards a New Theory of Vision
- Kritik der reinen Vernunft
- Thus Spake Zarathustra
- Gorgias
- Plato and Platonism
- Notes from the Underground
- De profundis
- The Republic
- Categoriae. English
- Aesthetical Essays of Frederich Schiller
- Ainsi Parlait Zarathoustra
- Politics: A Treatise on Government
- Improvement of the Understanding
- A Treatise of Human Nature
- The Critique of Practical Reason
- The Essays of Montaigne — Complete
- The Metaphysical Elements of Ethics
- Phaedrus
- The Law and the Word
- The Essays of Montaigne — Volume 02
- Beyond Good and Evil
- The Essays of Montaigne — Volume 01
- Essays
- Phaedo
- Timaeus
- Atheism in Pagan Antiquity
- The Praise of Folly
- A Short History of Greek Philosophy
- Civil Disobedience
- The Critique of Pure Reason
- Philebus
- Ethica
- An Enquiry Concerning Human Understanding
- Discours de la méthode
- Shorter Prose Pieces
- A Philosophical Dictionary, Volume 1
- A Selection from the Discourses of Epictetus with the Encheiridion
- Apology, Crito, and Phaedo of Socrates
- Ethics — Part 4
- The Physiology of Marriage, Part 2
- Apology
- The Prince
- Euthydemus
- Myth and Science
- Laws
- Ethics — Part 3
- Poetics. English
- Parmenides
- Democracy and Social Ethics
- Essays