Doting Thomists: Aquinas and Christian Philosophy (Waco, TX: Baylor University Press, forthcoming)
(ed.) A Second Look at First Things: A Case for Conservative Politics. The Hadley Arkes Festschrift (w/ R. P. George, Susan McWilliams) (South Bend, IN: St. Augustine’s Press, 2013)
Politics for Christians: Statecraft as Soulcraft. (Downers Grove, IL: Intervarsity Press, 2010)
Return to Rome: Confessions of an Evangelical Catholic (Grand Rapids, MI: Brazos Press, 2009).
Defending Life: A Moral and Legal Case Against Abortion Choice (New York: Cambridge University Press, 2007)
(ed.) To Everyone An Answer: A Case for the Christian Worldview – Essays in Honor of Norman L. Geisler (w/ William Lane Craig, J. P. Moreland) (Downers Grove, IL: Intervarsity Press, 2004)
Law, Darwinism, & Public Education: The Establishment Clause & the Challenge of Intelligent Design (Lanham, MD: Rowman & Littlefield, 2003).
(ed.) Do the Right Thing: Readings in Applied Ethics & Social Philosophy, 2nd ed. (Belmont, CA: Wadsworth, 2002)
(ed.) The New Mormon Challenge: Responding to the Latest Defenses of a Fast-Growing Movement (w/ Carl Mosser, Paul Owen) (New York: HarperCollins / Grand Rapids, MI: Zondervan, 2002)
(ed.) The Abortion Controversy 25 Years After Roe v. Wade: A Reader, 2nd ed. (w/ Louis Pojman) (Belmont, CA: Wadsworth, 1998)
Relativism: Feet Firmly Planted in Mid-Air (w/ Gregory P. Koukl) (Grand Rapids, MI: Baker, 1998)
(ed.) Affirmative Action: Social Justice or Reverse Discrimination? (w/ Todd Jones) (Amherst, NY: Prometheus Books, 1997)
Politically Correct Death: Answering the Arguments for Abortion Rights (Grand Rapids, MI: Baker, 1993)
(ed.) Are You Politically Correct?: Debating America’s Cultural Standards (w/ Michael Bauman) (Amherst, NY: Prometheus Books, 1993)
The Mormon Concept of God: A Philosophical Analysis (w/ Stephen Parrish), Studies in American Religion vol. 55 (Lewiston, NY: The Edwin Mellen Press, 1991)
David Hume’s Argument Against Miracles: A Critical Analysis (Lanham, MD: University Press of America, 1989)