Summa Theologiae Secunda Secundae, 1-91 (Latin-English Opera Omnia)

The most important work of the towering intellectual of the Middle Ages, Thomas Aquinas's Summa Theologiae remains one of the great seminal works of philosophy and theology, while extending to subjects as diverse as law and government, sacraments and liturgy, and psychology and ethics. One of the largest volumes in the Summa Theologiae, Thomas tackles every virtue and every vice, laying out their relations, causes, and definitions.

• Summa Theologiae Secunda Secundae, 92-189 (Latin-English Opera Omnia)
• Summa Theologiae Prima Secundae, 1-70 (Latin-English Opera Omnia)
• Summa Theologiae Prima Secundae, 71-114 (Latin-English Opera Omnia)
• Summa Theologiae Prima Pars, 50-119 (Latin-English Opera Omnia)
• Summa Theologiae Prima Pars, 1-49 (Latin-English Opera Omnia)
• Summa Theologiae Tertia Pars, 1-59 (Latin-English Opera Omnia)
• Summa Theologiae Tertia Pars, 60-90 (Latin-English Opera Omnia)
• The Trinity: An Introduction to Catholic Doctrine on the Triune God (Thomistic Ressourcement)
• On God and Christ: The Five Theological Orations and Two Letters to Cledonius (St. Vladimir's Seminary Press) (St. Vladimir's Seminary Press: Popular Patristics)
• Summa Theologiae Supplementum 69-99 (Latin-English Opera Omnia)