- The Critique of Pure Reason
- Meno
- The Golden Sayings of Epictetus
- Crito
- Criminal Sociology
- Timaeus
- Phaedo
- Apology, Crito, and Phaedo of Socrates
- The Metaphysical Elements of Ethics
- An Enquiry Concerning Human Understanding
- The Ego and His Own
- Homer and Classical Philology
- Fundamental Principles of the Metaphysic of Morals
- The Essays of Arthur Schopenhauer; Religion, a Dialogue, Etc.
- The Heart of the New Thought
- Politics: A Treatise on Government
- The Existence of God
- Auguste Comte and Positivism
- Feuerbach: The roots of the socialist philosophy
- A Lie Never Justifiable
- Walden
- The Royal Wedding - Official Souvenir Programme
- The Critique of Practical Reason
- Letters on England
- Kritik der reinen Vernunft
- Thus Spake Zarathustra
- Träume eines Geistersehers, erläutert durch Träume der Metaphysik
- Liberalism
- Youth and Sex
- Critias
- Varieties of Religious Experience, a Study in Human Nature
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- A Short History of Greek Philosophy
- A Selection from the Discourses of Epictetus with the Encheiridion
- A Selection from the Discourses of Epictetus with the Encheiridion
- The Physiology of Marriage, Part 2
- Myth and Science
- Euthydemus
- A Philosophical Dictionary, Volume 1
- Essays
- Democracy and Social Ethics
- Apology
- Parmenides
- The Selections from the Principles of Philosophy
- Poetics. English
- Laws
- Shorter Prose Pieces
- Essays
- Beyond Good and Evil
- Hinduism and Buddhism, An Historical Sketch, Vol. 1
- Essays of Schopenhauer
- The Young Woman's Guide
- How to Marry Well
- Secret Societies
- Atheism in Pagan Antiquity
- Cratylus
- Moral Philosophy
- Thoughts out of Season Part I
- Utilitarianism
- The Prince
- Civil Disobedience
- The Philosophy of the Moral Feelings
- Levels of Living
- Ethica
- Plato and Platonism
- Book of Wise Sayings
- The Republic
- Ainsi Parlait Zarathoustra
- Categoriae. English
- When a Man Comes to Himself
- A Treatise of Human Nature
- Improvement of the Understanding
- De profundis
- A Man's Value to Society
- Tragic Sense Of Life
- Phaedrus
- Study of a Woman
- Chinese Literature
- Summa Theologica, Part II-II (Secunda Secundae)
- The Ethics of Aristotle
- The Symposium
- The Memorable Thoughts of Socrates
- Notes from the Underground
- The Soul of Man under Socialism
- Ethica. English
- The Destiny of Man
- The Philosophy of Spinoza
- Gorgias
- A Essay Towards a New Theory of Vision
- The Map of Life
- A Philosophical Dictionary, Volume 4
- Ion
- Sophist
- Statesman
- Crime: Its Cause and Treatment
- Protagoras
- The Consolation of Philosophy
- On Being Human
- Catherine De Medici
- The Essays of Arthur Schopenhauer; Studies in Pessimism