Popular historian and award-winning author Jon M. Sweeney relates the untold story of St. Francis's friendship with Elias of Cortona, the man who helped him build the Franciscan movement. Sweeney uses the complexities of their relationship in a narrative of how their efforts changed the world and how Elias's enthusiasm almost betrayed the ideals of his friend. Blending history and biography, Sweeney reveals how Francis and Elias rebuilt churches, aided lepers, and entertained as "God's troubadours" to the delight of everyday people who had grown tired of a remote and tumultuous Church. At the height of their spiritual renaissance, however, Elias became "the devil" to many of the other friars; they believed him to be a traitor to their ideals. After Francis's premature death, the movement fractured. Scorned by most of the Franciscan leadership, Elias followed a path that would leave him a lonely, broken man. Sweeney shows how Elias's undoing was rooted in his attempts to honor his old friend.