Josef Pieper. Guide to Thomas Aquinas. New York: Pantheon Books, 1962.
Commentary
The Medieval Contribution to Political Thought
A. P. d'Entrèves. The Medieval Contribution to Political Thought: Thomas Aquinas, Marsilius of Padua, Richard Hooker. New York: Humanities Press, 1959.
The Life of Saint Thomas Aquinas: Biographical Documents
Kenelm Foster, ed. The Life of Saint Thomas Aquinas: Biographical Documents. London: Longmans, Green, 1959.
The System of Thomas Aquinas
Maurice de Wulf. The System of Thomas Aquinas. New York: Dover, 1959.
St. Thomas Aquinas
Jacques Maritain. St. Thomas Aquinas. Translated by Joseph W. Evans and Peter O'Reilly. New York: Meridian Books, 1958.
Principality and Polity: Aquinas and the Rise of State Theory in the West
Thomas Gilby. Principality and Polity: Aquinas and the Rise of State Theory in the West. London: Longmans, Green, 1958.
The Political Thought of Thomas Aquinas
Thomas Gilby. The Political Thought of Thomas Aquinas. Chicago: University of Chicago Press, 1958.
Reality: A Synthesis of Thomistic Thought
Réginald Garrigou-Lagrange. Reality: A Synthesis of Thomistic Thought. Translated by Patrick Cummins. St. Louis: Herder, 1958.
Thomism and Aristotelianism by Harry Jaffa
Harry V. Jaffa. Thomism and Aristotelianism: A Study of the Commentary by Thomas Aquinas on the Nicomachean Ethics. Chicago: University of Chicago Press, 1952.
Elementa philosophiae Aristotelico-Thomisticae.
Joseph Gredt. Elementa philosophiae Aristotelico-Thomisticae. Freiburg im Breisgau: Herder, 1937.