""The Popes and Heresy in the Thirteenth Century"" by Albert Clement Shannon is a historical account of the Catholic Church's response to the rise of heresy in the 13th century. The book explores the role of the popes during this time, including their efforts to combat heresy and maintain the Church's authority. Shannon examines the key figures of the period, including Pope Innocent III, who played a crucial role in shaping the Church's response to...