John of Paris

On Royal and Papal Power

Translated with an introduction by J.A. Watt. MST 9. 1971. 261 pp. ISBN 978–0–88844–258–1 • $15.95


Pedro Alfonso

The Scholar’s Guide

A translation by Joseph R. Jones and John E. Keller of the twelfth-century Disciplina clericalis. MST 8. 1969. 117 pp. ISBN 978–0–88844–257–4 • $9.95


Thomas Aquinas

On Being and Essence

Translated with an introduction and notes by Armand Maurer. Second revised edition. MST 1. 1968. 79 pp. ISBN 978–0–88844–250–5 • $11.95

Thomas’ short treatise De ente et essentia (On Being and Essence) is a classic text on the meaning and mystery of being. One of his early works, it was written before Thomas became Master of Theology at Paris in March 1256, and thus does not contain the architectonic metaphysical and theological structures of the Summa theologiae and the Summa contra Gentiles.


Etienne Gilson

Being and Some Philosophers

Second edition, corrected and enlarged, reprinted with minor corrections, 2016. xii, 235 pp. Paperback: ISBN 978-0-88844-415-8 • $25.00

Second edition, corrected and enlarged, 1952. xii, 235 pp. Casebound: ISBN 978-0-88844-401-1 • $39.95

The study of being was one of the main preoccupations of Gilson’s scholarly and intellectual life. Being and Some Philosophers is at once a testament to the persistence of those concerns and an important landmark in the history of the question of being. The book charts the ways in which being is translated across history, from unity in Plato and substance in Aristotle to essence in Avicenna and the act of existence in Aquinas. It examines the vicissitudes of essence and existence in Suarez and Christian Wolff, in Hegel and Kierkegaard, in order to uncover the metaphysical and existential foundations of modern thought.


Thomas Aquinas

On Kingship to the King of Cyprus

Translated by Gerald B. Phelan; revised with an introduction and notes by I.Th. Eschmann. MST 2. 1949. xl, 119 pp. ISBN 978–0–88844–251–2 • $12.95

Aquinas outlines the justification and proper practice of kingly government.

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