Commentary on Thomas Aquinas's Treatise on Happiness and Ultimate Purpose

Commentary on Thomas Aquinas's Treatise on Law

Commentary on Thomas Aquinas's Treatise on Divine Law

What We Can't Not Know: A Guide, Edition 2

The Line Through the Heart: Natural Law as Fact, Theory, and Sign of Contradiction

The Revenge of Conscience: Politics and the Fall of Man

The Revenge of Conscience: Politics and the Fall of Man

True Tolerance: Liberalism and the Necessity of Judgment

How and How Not to Be Happy

How to Stay Christian in College

Ask Me Anything 2: More Provocative Answers for College Students

Ask Me Anything: Provocative Answers for College Students