Peter Kreeft

Peter John Kreeft is an American professor of philosophy at Boston College and The King's College. A convert to Catholicism, he is the author of over eighty books on Christian philosophy, theology, spirituality and apologetics. 

One of the most prolific Christian authors of our time. His books cover a vast array of topics in spirituality, theology, and philosophy. They include Doors in the Walls of the World, The Greatest Philosopher Who Ever Lived, How to Be Holy, Because God Is Real, You Can Understand the Bible, and Summa of the Summa.