• Theology Index
• General
• Scripture
• Dogmatic
• Liturgical
• Moral
• Theologians to Read

• Sussidi di Teologia
  • PUSC series of theological manuals
• Studi di Teologia
  • PUSC series of theological studies

• Teologia by by I Dizionari San Paolo
• Sacramentum Mundi

• Scheeben, Matthias Joseph. The Mysteries of Christianity. Translated by Cyril Vollert. Second edition. Steubenville, Ohio: Emmaus Academic, 2023.

• Congar, Yves. 1967. Tradition and traditions; an historical and a theological essay. New York: Macmillan.
• Congar, Yves. 2004. The meaning of tradition. San Francisco: Ignatius Press.

• De Trinitate by Augustine
• The Mystery of Communion. Encountering the Trinity by G. Maspero
• The God of Jesus Christ, Meditations on the Triune God by J. Ratzinger
• Rethinking Trinitarian Theology: Disputed Questions And Contemporary Issues in Trinitarian Theology by G. Maspero – R.J. Wozniak
• Les réalisations du renouveau trinitaire au XXe siècle by Durand, Emmanuel, and
  Holzer, Vincent.
• The Oxford Handbook of the Trinity by Levering, Matthew, and Émery, Gilles.
• Nicea and its Legacy. An Approach to the Fourth-Century Trinitarian Theology by Ayres, Lewis O
• Augustine and the Trinity by Ayres, Lewis O.
• The Trinitarian Theology of St. Thomas Aquinas by Emery, Gilles
• Medieval Trinitarian Thought from Aquinas to Ockham by Friedman, Russell L.
• Being as Communion: Studies in the Personhood of the Church by Zizioulas, John D
• Communion & Otherness: Further Studies in Personhood and the Church by Zizioulas, John D

• On the Resurrection of the Flesh (De Carnis Resurrectuone) by Tertullian
• On the Incarnation of the Word by St. Athanasius

• Begasse de Dhaem, Amaury. 2021. Mysterium Christi: cristologia e soteriologia trinitaria. Assisi: Cittadella editrice.
• Benedict, Adrian J. Walker, and Philip J. Whitmore. 2007. Jesus of Nazareth. 3 vols. New York: Doubleday.
• Bulgakov, Sergiĭ. 2008. The Lamb of God. Grand Rapids, Mich: W.B. Eerdmans Pub. Co.
• Galot, Jean. 1981. Who is Christ?: a theology of the incarnation. Chicago, IL: Franciscan Herald Press.
• Kasper, Walter. 2016. The God of Jesus Christ. New York: Paulist Press.
• Lonergan, Bernard, Robert M. Doran, and Jeremy D. Wilkins. 2016. The incarnate word. Toronto: Lonergan Research Institute of Regis College.
• White, Thomas Joseph. 2017. The incarnate Lord a thomistic study in christology. Washington D.C: The Catholic University of America Press.

• Placuit Deo (2018) by CDF

• God So Loved the World: Clues to Our Transcendent Destiny from the Revelation of Jesus by Robert Spitzer, S.J.
• Dare We Hope “That All Men Be Saved”? by Hans Urs von Balthasar

• On the Holy Spirit by St. Basil
• The Comforter by Sergius Bulgakov

• Ladaria, Luis F. 2012. Antropologia teologica. Roma: G&B Press.

• Feingold, Lawrence. 2010. The natural desire to see God according to St. Thomas and his interpreters. Ave Maria, FL: Sapientia Press.

Scheeben, Matthias Joseph. The Glories of Divine Grace. Translated by Patrick Shaughnessy. Gastonia, NC: TAN Books, 2023.

• Wood, Jacob W. 2019. To stir a restless heart: Thomas Aquinas and Henri de Lubac on nature, grace, and the desire for God. Washington, D.C.: The Catholic University of America Press.

• Ortiz, Jared. 2019. Deification in the Latin patristic tradition. Washington, D.C.: The Catholic University of America Press.
• Russell, Norman. 2009. The doctrine of deification in the Greek patristic tradition. Oxford: Oxford University Press.

• Eschatology: Death and Eternal Life by Joseph Ratzinger

• Ut Unum Sint by JP II
• Introduction to the Mystery of the Church by Fr. La Soujeole
• The Bride of the Lamb by Sergius Bulgakov