Peter Kreeft, Ph.D., Professor of Philosophy at Boston College, is one of the most respected Christian authors of our time. His many bestselling books cover a vast array of topics in spirituality, theology, and philosophy. They include How to Be Holy, Practical Theology, Back to Virtue, Because God Is Real, You Can Understand the Bible, Angels and Demons, Heaven: The Heart's Deepest Longing, and A Summa of the Summa.