Christopher Ruddy is an associate professor of historical and systematic theology at the Catholic University of America in Washington, D.C. He wrote about the theology of Pope Benedict in a June 3, 2005, Commonweal magazine article titled “No Restorationist.”

Dennis Doyle is a professor of religious studies at the University of Dayton and a frequent commentator and author on Catholic issues and the papacy.

Rocco Palmo runs the blog Whispers in the Loggia, one of the most popular sites in the Catholic blogosphere. He is a frequently quoted expert on Vatican developments and was formerly a Philadelphia-based U.S. correspondent for The Tablet of London.

John S. Grabowski is an associate professor of religious studies at the Catholic University of America in Washington, D.C. He also has an expertise in women’s issues. He and his wife were appointed to the Pontifical Council for the Family by Pope Benedict XVI in the fall of 2009.

Christopher Bellitto is chair of the history department at Kean University in New Jersey, where he has taught a course on the papacy. He has also written many articles on Catholicism and is a regular television commentator on Vatican stories.

Ignatius Press, located in San Francisco, is the official publisher of all Benedict’s works in English, including all those he wrote as a priest and cardinal. The CEO of Ignatius Press is Mark Brumley.

Written by Michael S. Rose (Spence Publishing, 2005). Rose examines the areas where Pope Benedict may break with his predecessor Pope John Paul II.

Written by Stephen Mansfield (Tarcher, 2005). Mansfield analyzes Pope Benedict’s life including his transition from a liberal theologian associated with Vatican II to a theological conservative who became Pope John Paul’s closest ally.

Written by the Rev. Aidan Nichols (Burns & Oates, 2005). Nichols presents a full-scale investigation of Joseph Ratzinger’s theology, from the 1950s to the present day in this update of Nichols’ original book on Ratzinger’s theology written in the 1980s.