Renowned Franciscan scholar Paul Sabatier called it "the most important work that has been made on the life of Saint Francis." The Book of the Conformity (often called The Conformities) represents the highest point of medieval glorification of the figure of St. Francis. It contains a nearly complete record of the saint's own writings, and a vast store of material from all the known hagiographical legends of the saint from the 13th through late 14th centuries. In addition, it has extensive lists of the places where Franciscan friars, Poor Clare nuns and Franciscan tertiaries lived and ministered, with personal details about many Franciscan personages, both famous and obscure.
The author, Bartholomew of Pisa, divided his large work into what he calls 3 "Books". Part 1 concerns the Incarnation, the Nativity and the early life of Jesus, with corresponding similarities to be found in the early years of Francis's life. Part 2 concerns the years of the public ministry of Jesus, his preaching and healing, calling of disciples, travels from one place to another, with similar events in the life of Francis. Part 3 concerns the Passion, Death, Resurrection and Ascension/Glorification of Christ, and the events of Francis's last days, his illnesses and suffering, his receiving of the stigmata, his death, canonization, and the miracles attributed to him as a heavenly intercessor.