The following books are not in the public domain and thus cannot be included in this OER. However, they are referenced in the dialogues and annotations, which accompany the primary source material.
Bonhoeffer, Dietrich. I Loved This People: Testimonies of Responsibility. S. P. C. K., 1966.
Caputo, John D. The Weakness of God: A Theology of the Event. Indiana University Press, 2006.
Freud, Sigmund. The Future of an Illusion. Garden City, NY: Doubleday, 1957.
_____. Civilization and Its Discontents. W. W. Norton & Company, 1989.
Hägglund, Martin. This Life: Secular Faith and Spiritual Freedom. Knopf Doubleday Publishing Group, 2019.
Himes, Rev Michael J. The Mystery of Faith: An Introduction to Catholicism. St. Anthony Messenger Press, 2004.
Johnson, Elizabeth A. She Who Is: The Mystery of God in Feminist Theological Discourse. Crossroad Publishing Company, 1992.
Kreeft, Peter, and Ronald K. Tacelli. Handbook of Christian Apologetics. InterVarsity Press, 2009.
Latour, Bruno. Rejoicing: Or the Torments of Religious Speech. Translated by Julie Rose. 1 edition. Cambridge: Polity, 2013.
Merton, Thomas. No Man Is an Island. Barnes & Noble Books, 1978.
Middleton, J. Richard. The Liberating Image: The Imago Dei in Genesis 1. Brazos Press, 2005.
Rahner, Karl. The Trinity. Bloomsbury Publishing, 2001.
Thorsteinsson, Runar. Roman Christianity and Roman Stoicism: A Comparative Study of Ancient Morality. Oxford, UK: Oxford University Press, 2010.
Tillich, Paul. The Courage to Be. Yale University Press, 2000.
Wittgenstein, Ludwig. Philosophical Occasions: 1912-1951. Edited by James Klagge and Alfred Nordmann. Indianapolis, IN: Hackett Publishing, 1993.