Summa contra Gentiles by St. Thomas Aquinas (Complete & Unabridged in 4 books)

The Summa contra Gentiles by St. Thomas Aquinas, also known as the Summa contra Gentes, has traditionally been dated to 1264, though more recent scholarship places it towards the end of Thomas’ life, 1270-73. The work has occasioned much debate as to its purpose, its intended audience and its relationship to his other works. Thomas' work is divided into several categories: Scriptural commentaries, Aristotelian commentaries, Opuscula (smaller works), disputed questions and theological syntheses.