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- Bokenkotter, Thomas. A Concise History of the Catholic Church (2005) excerpt and text search
- Catholic Encyclopedia, (1913) online edition thousands of articles on related topics
- Coppa, Frank J., ed. Encyclopedia of the Vatican and Papacy. Greenwood, 1998. 473 pp.
- Duffy, Eamon. Saints and Sinners: A History of the Popes, (3rd ed 2006), 496pp; Yale University Press; heavily illustrated history by leading Catholic scholar excerpt and text search
- Kelly, J.N.D. The Oxford Dictionary of Popes (1988). 349pp; scholarly short biographies; online edition
- Levillain, Philippe, ed. The Papacy: An Encyclopedia. Routledge, 2001. 1780 pp.
- New Catholic 'Encyclopedia (1967), numerous articles
- Steimer, Bruno and Parker, Michael G., ed. Dictionary of Popes and the Papacy. Crossroad, 2001. 278 pp.
- Trigilio, John. and Kenneth Brighenti. Catholicism for Dummies (2003) excerpt and text search
- Vidmar, John. The Catholic Church through the Ages: A History (2005) excerpt and text search
- Brown, Peter. The Rise of Western Christendom: Triumph and Diversity 200-1000 AD (2002), 640pp
- Chadwick, Owen. The Popes and European Revolution. Oxford U. Press, 1981. 646 pp.
- Daniel-Rops, Henri. The Church in the Eighteenth Century (1964)
- Daniel-Rops, Henri. The Church in an Age of Revolution (1965).
- Hales, E. E. Y. Revolution and Papacy, 1769-1846, (1960)
- Latourette, Kenneth S. A History of Christianity, Volume 1: Beginnings to 1500 (1975), by leading Protestant historian excerpt and text search
- Logan, F. Donald. A History of the Church in the Middle Ages. 2002. online edition
- Mullett, Michael A. The Catholic Reformation, (1999), online edition
- Pastor, Ludwig von. History of the Popes From the Close of the Middle Ages, (1894-1930), 16 vol, older Catholic history online from books.google.com
- Ullmann, Walter. A Short History of the Papacy in the Middle Ages, (2002), 393pp, online edition
- Wright, A. D. The Early Modern Papacy: From the Council of Trent to the French Revolution 1564-1789. Longman, 2000. 335 pp.
- Burns, Gene. "The Politics of Ideology: The Papal Struggle with Liberalism." American Journal of Sociology, 1990 95(5): 1123-1152. Issn: 0002-9602 fulltext: in Jstor and Ebsco
- Camp, Richard L. "From Passive Subordination To Complementary Partnership: The Papal Conception of a Woman's Place in Church and Society since 1878." Catholic Historical Review, 1990 76(3): 506-525. Issn: 0008-8080 Fulltext: in Ebsco
- Chadwick, Owen. A History of the Popes, 1830-1914. (1998), 616pp; a standard recent history. online edition,
- Coppa, Frank J. The Modern Papacy since 1789. Longman, 1998. 296 pp.
- Coppa, Frank J. "Between Anti-Judaism and Anti-Semitism, Pius XI's Response to the Nazi Persecution of the Jews: Precursor to Pius XII's "Silence"?" Journal of Church and State 2005 47(1): 63-89. Issn: 0021-969x Fulltext: in Ebsco
- Gillis, Chester, ed. The Political Papacy: John Paul II, Benedict XVI, and Their Influence. Paradigm, 2006. 208 pp.
- Holland, Joe. Modern Catholic Social Teaching: The Popes Confront the Industrial Age 1740-1958. Paulist Press, 2003. 404 pp.
- Latourette, Kenneth Scott. Christianity in a Revolutionary Age: A History of Christianity in the Nineteenth and Twentieth Centuries 5 Vol (1958), a detailed history of Chritianity 1800-1950 by a fair-minded Protestant scholar. vol 1 online edition
- Pollard, John F. Money and the Rise of the Modern Papacy: Financing the Vatican, 1850-1950. Cambridge U. Press, 2005. 265 pp.
Authoritative Catholic sources
- New American Bible
- Jerusalem Bible
- New Jerusalem Bible
- Revised New Jerusalem Bible
Ecumenical Bibles with Catholic participation.
- New Revised Standard Version with Apocrypha/Deuterocanonical Books
- New Revised Standard Version (Catholic edition)
- New Revised Standard Version with Apocrypha/Deuterocanonical Books (anglicized edition)
- Revised English Bible with Apocrypha
- Neuner & Dupuis, Christian Faith, selections from officialdeclarations by Popes & Ecumenical Councils
- Catechism of the Catholic Church, authorized by Pope John Paul II