- Augustine of Hippo
- Pope John Paul II
- Scott Hahn
- Ralph McInerny
- Thomas à Kempis
- Jill Paton Walsh
- Peter Kreeft
- Paul L. Maier
- Thérèse of Lisieux
- Fulton J. Sheen
- Pope Benedict XVI
- Bruce Brooks
- Malcolm Muggeridge
- George Weigel
- Juan de la Cruz
- Benedict J. Groeschel
- Thomas Aquinas
- The Detection Club
- Sylvia Engdahl
- Carol Kendall