Aristotle, Nicomachean Ethics, translated Terence Irwin. Hackett Publishing, 2000.
Blackburn, Simon. The Oxford Dictionary of Philosophy, second edition. Oxford University Press, 2008.
Epictetus. The Handbook (The Encheiridion), translated by Nicholas White. Hackett Publishing, 1983.
Haidt, Jonathan. The Happiness Hypothesis: Finding Modern Truth in Ancient Wisdom. Basic Books, 2006
Plato, Republic, trans. G.M.A. Grube and C.D.C. Reeve. Hackett Publishing, 1992.
Shay, Jonathan. Achilles in Vietnam: Combat Trauma and the Undoing of Character. Simon & Schuster, 1995.