Books about Ethics (sorted alphabetically)
- Ethics Benedictus de Spinoza
- Ethics and Modern Thought: A Theory of Their Relations Rudolf Eucken
- Ethics of Aristotle Aristotle
- ethics of Hercules : A study of man's body as the sole determinant of ethical values Robert Chenault Givler
- Ethics — Part 1 Benedictus de Spinoza
- Ethics — Part 2 Benedictus de Spinoza
- Ethics — Part 3 Benedictus de Spinoza
- Ethics — Part 4 Benedictus de Spinoza
- Ethics — Part 5 Benedictus de Spinoza
- Father Payne Arthur Christopher Benson
- Five Great Philosophies of Life William De Witt Hyde
- Fundamental Principles of the Metaphysic of Morals Immanuel Kant
- Genealogy of Morals Friedrich Wilhelm Nietzsche
- Hacia una Moral sin Dogmas: Lecciones sobre Emerson y el Eticismo (Spanish) José Ingenieros
- Handbook of Ethical Theory George Stuart Fullerton
- History of European Morals From Augustus to Charlemagne (Vol. 1 of 2) William Edward Hartpole Lecky
- History of European Morals From Augustus to Charlemagne (Vol. 2 of 2) William Edward Hartpole Lecky
- Human Nature, and Other Sermons Joseph Butler
- Ihmisen velvollisuudet (Finnish) Giuseppe Mazzini
- Is Life Worth Living? W. H. Mallock
- Issues in Ethics Samuel Vaknin
- Jenseits von Gut und Böse (German) Friedrich Wilhelm Nietzsche
- Kant-breviarium: Kant világnézete és életfelfogása (Hungarian) Immanuel Kant
- Kant's gesammelte Schriften. Band V. Kritik der praktischen Vernunft. (German) Immanuel Kant
- Lectures on the true, the beautiful and the good Victor Cousin