"Chronicle of the Popes: The Reign-by-Reign Record of the Papacy from St. Peter to the Present" by P.G. Maxwell-Stuart
"Heirs of the Fisherman: Behind the Scenes of Papal Death and Succession" by John-Peter Pham
"The Incredible Book of Vatican Facts and Papal Curiosities: A Treasury of Trivia" by Nino Lo Bello
"Keepers of the Keys: A History of the Popes from St. Peter to John Paul II" by Nicolas Cheetham
"Lives of the Popes: The Pontiffs from St. Peter to John Paul II" by Richard McBrien
"Saints and Sinners: A History of the Popes" by Eamon Duffy
"Vicars of Christ: Popes, Power, and Politics in the Modern World" by Michael Riccards
"White Smoke: A Novel About the Next Papal Conclave" by Andrew M. Greeley
