An Introduction to Medieval Philosophy: Some Basic Concepts (Malden MA: Wiley-Blackwell, 2009). Co-edited books (with Graham Oppy), Theism and Atheism: Opposing Arguments In Philosophy (Farmington Hills MI: Cengage Gale, 2018). (with Ron Begley), Medieval Education (Bronx NY: Fordham University Press, 2005). (with John Conley, S.J.), Culture and Creed (Philadelphia PA: St Joseph's University Press, 2004). (with David Ruel Foster), The Two Wings of Catholic Thought: Essays on Fides et Ratio (Washington, D.C.: The Catholic University of America Press, 2003). (with Raymond J. Langley), Karl Jaspers on Philosophy of History and History of Philosophy (Amherst, NY: Humanity Press, 2003). (with John J. Conley, S.J.), Prophecy and Diplomacy: The Moral Teaching of Pope John Paul II (New York: Fordham Univ. Press, 1999). Selected articles "A Reading Guide to Natural Law Ethics" in Ressourcement Thomism: Essays in Honor of Romanus Cessario, O.P., edited by Matthew Levering and Reinhard Hutter (forthcoming). "The Status of Personalism in Catholic Moral Thinking Today" - Dunwoodie Review (forthcoming). "Memory and The Tempest" in Tolle lege: Essays on Augustine and Medieval Philosophy in Honor of Roland J. Teske, S.J., edited by David Twetten et al. (forthcoming). "Society and the Formation of Free Persons" in Yves R. Simon: The Call of Philosophy (Texts with Commentaries), edited by John W. Carlson (Washington, D.C.: The Catholic University of America Press, forthcoming). "Jaspers on Truth and Freedom" in Companion to Karl Jaspers, edited by Gregory J. Walters (Amherst NY: Humanity Press, forthcoming). "Aquinas on the Sacrament of Marriage" in Rediscovering Aquinas and the Sacraments, edited by Mtthew Levering and Michael Dauphinais (Chicago IL: Hillenbrand Books, 2009), pp. 102–13. "Theological Reflections on Natural Family Planning" in Nova et Vetera 6/4 (2008): 765-77. "Calderon's La vida es un sueno" in St. Austin Review 8/1 (2008): 15-17. "More's Reflections on Complicity with Evil in The History of King Richard III" in Thomas More Studies 2 (2007): 53-62. "Non-Negotiable Principles of Christian Politics" in Inside Fordham 29/15 (June 29, 2007): 5. "The Four Senses of Scripture" in The Brandsma Review 16/2 (2007): 14-16. "The Use of Philosophical Principles in Catholic Social Thought: The Case of Gaudium et Spes" in The Journal of Catholic Legal Studies (St. John's University Law Review) 45/2 (2007): 277-92. "The Doctrine of Participation in Aquinas's Commentary on St. John" in Being and Thought in Aquinas, edited by Jeremiah Hackett, William Murnion, and Carl Still (Binghamton NY: Global Academic Publ., 2004), pp. 109–21. "Boethius