- The Philosophy of Spinoza
- The Physical Life of Woman:
- The Investment of Influence
- A Treatise of Human Nature
- The Memorable Thoughts of Socrates
- Initiation into Philosophy
- The Royal Wedding - Official Souvenir Programme
- The Unseen World and Other Essays
- The Critique of Practical Reason
- Politics: A Treatise on Government
- Poetics. English
- Ethics — Part 1
- Morals in Trade and Commerce
- Crime: Its Cause and Treatment
- The Prince
- On Being Human
- The Republic
- Civil Disobedience
- A Lie Never Justifiable
- Protagoras
- Youth and Sex
- Atheism in Pagan Antiquity
- Notes from the Underground
- The Faith of Our Fathers
- Ethics — Part 2
- Essays
- Letters to His Son on the Art of Becoming a Man of the World and a Gentleman, 1753-54
- The Philosophy of the Moral Feelings
- The Law and the Word
- Ancient and Modern Celebrated Freethinkers
- Crito
- Our Fathers Have Told Us
- The Positive School of Criminology
- The Plain Man and His Wife
- The Plain Man and His Wife
- The Philosophy of Evolution
- Laws
- Essays
- Seekers after God
- The Golden Sayings of Epictetus
- The Selections from the Principles of Philosophy
- Little Essays of Love and Virtue
- Beyond Good and Evil
- The Philosophy of Despair
- Another Study of Woman
- Myth and Science
- Apology
- A Philosophical Dictionary, Volume 1
- The Physiology of Marriage, Part 2
- Improvement of the Understanding
- When a Man Comes to Himself
- Categoriae. English
- Philebus
- Fundamental Principles of the Metaphysic of Morals
- Modern Women and What is Said of Them
- The Metaphysical Elements of Ethics
- Thus Spake Zarathustra
- The Critique of Pure Reason
- The Soul of Man under Socialism
- Democracy and Social Ethics
- The Heart of the New Thought
- Feuerbach: The roots of the socialist philosophy
- The Existence of God
- The Ethics of Aristotle
- A Man's Value to Society
- Study of a Woman
- A System of Logic: Ratiocinative and Inductive
- Apology, Crito, and Phaedo of Socrates
- Ethics — Part 4
- Statesman
- Sophist
- Ethics — Part 3
- A Short History of Greek Philosophy
- Criminal Sociology
- Social Justice Without Socialism
- How To Behave: A Pocket Manual of Republican Etiquette, and Guide to Correct Personal Habits
- How to Observe
- Lessons in Life, for All Who Will Read Them
- A Philosophical Dictionary, Volume 10
- Liberalism
- Ethics — Part 5
- Utilitarianism
- Secret Societies
- An Enquiry Concerning Human Understanding
- Thoughts out of Season Part I
- A Historical Survey of the Customs, Habits, & Present State of the Gypsies
- Levels of Living
- The Young Woman's Guide
- A Critical Examination of Socialism
- The Consolation of Philosophy
- Chinese Literature
- The Basis of Morality
- A Essay Towards a New Theory of Vision
- How to Marry Well
- The Ego and His Own
- Letters to His Son on the Art of Becoming a Man of the World and a Gentleman, 1751
- The Map of Life
- Homer and Classical Philology
- Book of Wise Sayings
- The Destiny of Man