The Ways of God

De Sortibus: A Letter to a Friend about the Casting of Lots

Aquinas's Shorter Summa: Saint Thomas's Own Concise Version of His Summa Theologica

Truth, 3 Volumes: Questions I - XXIX

Summa Theologica (Part 2.2)

Summa Theologica, Volume 1

On Prayer and The Contemplative Life

Aquinas Ethicus: The Moral Teaching of St. Thomas, Vol. 1

Aquinas Ethicus: The Moral Teaching of St. Thomas, Vol. 2

Summa Theologica Selections

Summa Theologica: part I

Summa Theologica Selections EPub

Selected Philosophical Writings

Selected Writings

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

Summa Contra Gentiles: Book One: God

Summa Contra Gentiles: Book Four: Salvation