Tom L. Beauchamp & LeRoy Walters, Contemporary Issues in Bioethics, 6th ed. (Wadsworth, 2003)

David Hume, An Inquiry Concerning the Principles of Morals (1751; Hackett Pub. Co., 1983)

Aldous Huxley, Brave New World (1932; Perennial, 1998)

Immanuel Kant, Foundations of the Metaphysics of Morals, Beck trans. (1785; Macmillan, 1990)

Plato, Euthyphro, Jowett trans. (380 B.C.E.; http://classics.mit.edu/Plato/euthyfro.html)

John Stuart Mill, Utilitarianism (1861; Hackett Pub. Co., 1979)

John Steinbeck, Of Mice and Men (1937; Penguin, 1993)