Aquinas: Basic Works

The Arrogance of Humanism

Treatise on Law

On Law, Morality, and Politics: Edition 2

Medieval Philosophy: A Very Short Introduction

Summa Theologica (All Complete & Unabridged 3 Parts + Supplement & Appendix + interactive links and annotations)

Aristotle's Children: How Christians, Muslims, and Jews Rediscovered Ancient Wisdom and Illuminated the Middle Ages

On the Power of God

Philosophy in the Middle Ages: The Christian, Islamic, and Jewish Traditions, Edition 3

The 'Summa Theologica' of St. Thomas Aquinas: Part 1, Questions L-LXXIV

Philovesophy

Summa Theologica, Part III (Tertia Pars)

Questions on Love and Charity: Summa Theologiae, Secunda Secundae, Questions 23–46

Maimonides: Life and Thought

Commentary on Aristotle's Politics

Dream of Reason: A History of Western Philosophy from the Greeks to the Renaissance (New Edition)

The Treatise on the Divine Nature: Summa Theologiae I 1-13

SUMMA THEOLOGICA: Including supplement, appendix, interactive links and annotations

Simon of Genoa's Medical Lexicon