1. Aquinas: 1269/1987, ‘Summa theologica’, in R.M. Hutchins (ed.), Great Books of the Western World, Vol. 19 (William Benton, Chicago), pp. 3–826
2. Augustine: 426/1987, ‘The city of God’, in R.M. Hutchins (ed.), Great Books of the Western World, Vol. 18 (William Benton, Chicago), pp. 129–618