""The Vicar of Christ"" is a historical novel written by William Humphrey and published in 1892. The book tells the story of Pope Innocent III, who was one of the most powerful and influential popes in the history of the Catholic Church. The novel follows his life from his early days as a young priest to his ascension to the papacy and his struggles to maintain the power and influence of the Church during a time of great political upheaval in Europe...