Summa Theologica: Volume 1, Part 1 (Prima Pars)

Summa Theologica: Volume 2, Part 1 of 2 (Prima Secundae)

Summa Theologica: Volume 5, Supplement to Part 3

Summa Theologica: Volume 3, Part 2 of Part 2 (Secunda Secundae)

Summa Theologica: Volume 4, Part 3 (Tertia Pars)

On Prayer and The Contemplative Life