An index of book lists for theological reading by fields.

• Book Index
• Theology
• Philosophy
• Fiction
• Non-Fiction
• Classics
• History
• Science

• Scripture
• Dogmatic
• Liturgical
• Moral
• Spirituality
• Primary Sources
• Theologians to Read
• Abbreviations

• What does the Bible say?
  • Reference dictionaries and commentaries.
• What do the Church Fathers say?
  • Reference dictionaries and encyclopedias.
• What do theological authorities say?
  • Aquinas in particular.
• What does the Magisterium say?
  • Early Councils, Trent, Vatican II
  • Denzinger

• Index theologicus
  • Free theological database search engine
• Atla Religion Database (Atla RDB)
  • http://web.b.ebscohost.com/ehost/search/selectdb?vid=0&sid=4cf98d12-b943-4123-9e41-3ebcd952a74c%40sessionmgr102
• Magisterium AI

• SLU
• CUA

Websites on various topics that are quite helpful.

• https://www.papalencyclicals.net/
• National Catholic Bioethics Center
• Original Languages Texts for Scripture
• https://oadtl.org/
  • Collection of open online resources (journals, databases, books, etc.)
• https://aquinasinstitute.org/
  • Online texts of Aquinas
• http://www.clerus.org/bibliaclerus/index_eng.html
  • Collection of magisterial documents and church fathers linked to scripture
• https://www.vatican.va/archive/aas/index_sp.htm
• https://docs.google.com/spreadsheets/d/e/2PACX-1vRkUFBfVVqv5Tr2aZS4apFNpTJ-ys6VqeQxgsAI1v7cH5putIgchYWJAVGHuu0lWGmdD2DU7Vb1o7XH/pubhtml#
  • Massive list of links to classical and medieval texts with online scans.

• Annales Theologici
  • Santa Croce's Journal
• Nova et Vetera
  • CUA
• The Thomist: A Speculative Quarterly Review
  • CUA
• Communio

• Bibliography on the History of Monasticism in Late Antiquity and the Early Middle Ages

• The Jewish War by Flavius Josephus
  • In The Works of Josephus: Complete and Unabridged by William Whiston, 1987
• Antiquities of the Jews by Flavius Josephus
  • In The Works of Josephus: Complete and Unabridged by William Whiston, 1987
• Historia Ecclesiastica by Eusebius of Caesarea
  • Eusèbe de Césarée. Histoire ecclésiastique (SCh 31, 41, 55) by G. Bardy, , 1952-1958
  • Eusebius Werke, II, Die Kirchengeschichte (Die griechischen christlichen Schriftsteller der ersten drei Jahrhunderte, 9, 1-3), by Th. Mommsen, apud E. Schwartz, 1903-1909
  • CPG 3495 (Not yet in CCGL)
  • PG 20: 45-906
• Historia ecclesiastica gentis Anglorum by Venerable Bede
  • Bede's Ecclesiastical History of the English People by B. Colgrave, R. Mynors, 1969
  • CPL 1375 (Not yet in CCSL)
  • PL 95: 21, 289

• Belloc, Hillaire. 2017. The Great Heresies. San Francisco: Ignatius Press.
• Bradley, James, and Richard Muller. 2016. Church History: An Introduction to Research Methods. Gran Rapids: Eerdmans.
• Carroll, Warren H. 2004-2013. A History of Christendom. 6 vols. Front Royal, VA: Christendom Press.
• Franzen, August, John Patrick Dolan, and Peter Becker. 1969. A Concise History of the Church. London: Burns & Oates.
• Hitchcock, James. 2012. History of the Catholic Church: From the Apostolic Age to the Third Millennium. San Francisco, CA: Ignatius Press.
• Tanner, Norman P. 2014. New Short History of the Catholic Church. London: Bloomsbury Continuum.
• Tanner, Norman P. 2008. The Church in the Later Middle Ages. London: I.B. Tauris.
• Woods, Thomas E. 2017. How the Catholic Church built Western Civilization. Washington: Regnery Publishing.

• Christopher Dawson
• Norman Tanner

For particular works by patristic fathers refer to the theologians section here fathers or look at the different theological sections for patristic works on those topics. This section contains works on the study of patristics in general or collected patristic works.

• The Fathers of the Church: A Comprehensive Introduction by Hubertus R. Drobner
• The Desert Fathers: Sayings of the Early Christian Monks by Benedicta Ward [R]
• La Predicacion cristiana antigua by Alexandre Olivar

Some sites the have original text available:

• CCEL Christian Classics Library
• CCEL Scripture Search Tool
• The Latin Library - Christian Writers
• Patristic Scripture Use Database
• Patrologia Latina Database
• http://www.earlymedievalmonasticism.org/index.htm

• The early church: an annotated bibliography of literature in English
• Dictionary of early Christian literature

• Encyclopedia of the early church translated by Adrian Walford
  • Dizionario patristico e di antichitá cristiane by by Angelo Di Berardin
• Encyclopedia of ancient Christianity by Angelo Di Berardino
  • Nuovo dizionario patristico e di antichità cristiane
• A dictionary of early Christian beliefs by David Bercot
• Letteratura patristica by I Dizionari San Paolo
• Clavis Patrum Latinorum (CPL)
  • List of critical editions for patristic works
  • There are other reference works like this for other classic christian works from Brepols
  • https://clavis.brepols.net/clacla/Default.aspx
• Patrology by Johannes Quasten
• Biblia patristica: index des citations et allusions bibliques dans la littérature patristique
• The Oxford Handbook of Early Christian Studies, edited by Susan Ashbrook Harvey and David G. Hunter.
• The Wiley Blackwell Companion to Patristics

• Liber Pontificalis
  • Duchesne Edition: Vol 1, Vol 2
    • He included the Annales Romani which extends the chronology into 1187.
  • Mommsen (MGH): Vol 1
    • Incomplete, only to 715.
    • Called Gesta Pontificum Romanorum
  • See also: Annales Romani (1044-1187) in MGH Scriptores V 18 (pgs. 468-480)
• Augustine (354 - 430)
  • Works in Latin
  • The Works of Saint Augustine, A Translation for the 21st Century
  • Brown, Peter. 2000. Augustine of Hippo: A Biography. Berkeley: University of California Press.

• Cyril of Jerusalem (313 - 386)
  • Protocatechesis and Catecheses
• Athanasius (328 - 373)
  • On the Incarnation
• Basil of Caesarea (330 - 379)
  • On the Holy Spirit
• Gregory of Nyssa (335 - 394)
• Gregory of Nazianzus (329 - 390)
• Gregory Palamas (1296 - 1357/59)
  • Pino, Tikhon. 2022. Essence and Energies: Being and Naming God in St Gregory Palamas. New York: Routledge.

• Davis, Leo Donald. 1983. The First Seven Ecumenical Councils (325-787) : Their History and Theology. Collegeville, Minn.: Liturgical Press.
• Kelly, Joseph F. 2009. The Ecumenical Councils of the Catholic Church: A History. Collegeville, Minn.: Liturgical Press.
• L’Huillier, Peter. 1996. The Church of the Ancient Councils: The Disciplinary Work of the First Four Ecumenical Councils. Crestwood, N.Y.: St. Vladimir’s Seminary Press.
• Tanner, Norman P. 2001. The Councils of the Church: A Short History. New York: Crossroad.

• Anatolios, Khaled. 2011. Retrieving Nicaea: The Development and Meaning of Trinitarian Doctrine. Grand Rapids, Mich.: Baker Academic.
• Ayres, Lewis. 2004. Nicaea and Its Legacy: An Approach to Fourth-Century Trinitarian Theology. Oxford: Oxford University Press.
• Kim, Young Richard, ed. 2021. The Cambridge Companion to the Council of Nicaea. Cambridge, United Kingdom: Cambridge University Press.
• International Theological Commision. 2025. Gesù Cristo, Figlio di Dio, Salvatore: 1700o anniversario del Concilio Ecumenico di Nicea (325-2025) .

• Schroeder, Henry J. 1978. Canons and Decrees of the Council of Trent. Rockford, Ill.: Tan Books and Publishers.

• The Documents of Vatican II: Vatican Translation. 2009. Vatican: Libreria Editrice Vaticana.

• Congar, Yves. 2012. My Journal of the Council. Collegeville, Minn.: Liturgical Press.
• Guarino, Thomas. 2018. The Disputed Teachings of Vatican ll: Continuity and Reversal in Catholic Doctrine. Grand Rapids, Michigan: W.B. Eerdmans.
• Levering, Matthew. 2017. An Introduction to Vatican II as an Ongoing Theological Event. Washington, D.C.: The Catholic University of America Press.
• Lubac, Henri de. 2015-2016. Vatican Council Notebooks. 2 Vols. San Francisco: Ignatius Press.
• Ratzinger, Joseph. 1966. Theological Highlights of Vatican II. New York: Paulist Press.

• Nostra Aetate by VII
• Dominus Jesus [R]
• Le religioni del mondo by I Dizionari San Paolo

• Fitzgibbons, Richard. 2019. Habits for a Healthy Marriage: A Handbook for Catholic Couples. San Francisco: Ignatius Press.

• Subsidia Canonica
  • PUSC canonical studies

• Introduction to the study of canon law by Javier Hervada
• Metodologia: la tesi e lo studio del diritto canonico by Eutimio Sastre Santos
• Canon Law Digest
  • Collection of authoritative comments and documents by year and canon.
  • Sold as a CD
• Roman Replies & CLSA Advisory Opinions (RRAO)
  • Can buy pdfs of all editions

• Marzoa, Ángel, Jorge Miras, Rafael Rodríguez-Ocaña, Ernest Caparros, Patrick Lagges, and Instituto Martín de Azpilcueta, eds. Exegetical Commentary on the Code of Canon Law. Engl. language ed. 8 vols. Annotated Legislative Texts. Montreal: Wilson & Lafleur, 2004.
• Code of Canon Law Annotated

• Rolker, Christof. Canon Law in the Age of Reforms (C. 1000 to C. 1150). Washington, D.C.: Catholic University of America Press, 2023.

• Norms for Proceeding in the Discernment of Alleged Supernatural Phenomena, DDF May, 17 2024

• Dicastery of Clergy. 2025. Decreto del Dicastero per il Clero sulla disciplina delle intenzioni delle Sante Messe. (Norms on Combining Intentions)
  • Congregation of the Clergy. 1991. Mors Iugiter. (Tentative permision to combine intentions)
• Dicastery of Legislative Texts. 2025. Nota esplicativa del Dicastero per i Testi Legislativi sul divieto di cancellazioni nel Registro parrocchiale dei battesimi.

• Il rito e il diritto. Quale relazione?. Rivista Liturgica. 2021 108/4.
• Del Pozzo, Massimo. 2013. La giustizia nel culto: profili giuridici della liturgia della Chiesa. Roma: EDUSC.
• Mussone, Davide. 2002. L'eucaristia nel Codice di diritto Canonico: Commento ai Can. 897-958. Città del Vaticano: Libreria Editrice Vaticana.
• Rincón-Pérez, Tomás, Antonio Sánchez Sánchez-Gil, and Alberto Perlasca. 2014. La liturgia e i sacramenti nel diritto della chiesa. Roma: EDUSC.