The following course texts are in the public domain and may be downloaded for free:

• Aquinas, Summa Theologica (vol. 20) from Internet Archive
• Aquinas, Summa Theologica (vol. 21) from Internet Archive
• Aquinas, Summa Theologica (vol. 22) from Internet Archive
• Aristotle, Loeb Classical Library (vol. 193) from Loebolus
• Aristotle, Organon (vol. 1) from Google Books
• Aristotle, Organon (vol. 2) from Google Books
• Chesterton, Orthodoxy from Google Books
• Cicero, Loeb Classical Library (vol. 268) from Loebolus
• Cicero, Loeb Classical Library (vol. 403) from Internet Archive
• Josephus, Loeb Classical Library (vol. 186) from Loebolus
• Plato, Loeb Classical Library (vol. 36) from Google Books
• Roberts and Donaldson, Ante-Nicene Fathers (vol. 1) from Google Books
• Roberts and Donaldson, Ante-Nicene Fathers (vol. 2) from Google Books
• Roberts and Donaldson, Ante-Nicene Fathers (vol. 3) from Google Books
  • Tertullian, On Repentance, 657–68
• Roberts and Donaldson, Ante-Nicene Fathers (vol. 4) from Google Books
• Roberts and Donaldson, Ante-Nicene Fathers (vol. 5) from Google Books
  • Cyprian, The Advantage of Patience, 484–91
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 2) from Google Books
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 3) from Google Books
  • Augustine, Enchiridion on Faith, Hope, and Love, 237–76 (part 1, part 2, part 3)
  • Augustine, On Continence, 379–93
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 4) from Google Books
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 5) from Google Books
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 6) from Google Books
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 8) from Internet Archive
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 10) from Google Books
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 11) from Google Books
• Schaff, Nicene and Post-Nicene Fathers, First Series (vol. 14) from Google Books
• Schaff and Wace, Nicene and Post-Nicene Fathers, Second Series (vol. 1) from Google Books
• Schaff and Wace, Nicene and Post-Nicene Fathers, Second Series (vol. 9) from Google Books
• Schaff and Wace, Nicene and Post-Nicene Fathers, Second Series (vol. 13) from Google Books
• Schaff and Wace, Nicene and Post-Nicene Fathers, Second Series (vol. 14) from Google Books