George Kaftal 
St. Francis in Italian Painting [PDF ebook] 

Originally published in 1950, this book shows that the religious and ethical values that St. Francis was striving after are as essential today as they were in his time. The book presents St. Francis as a complex personality and corrects the rather mawkish interpretation of certain legends. It deals with the environment and development of the saint’s personality and chapters from his biographies by Thomas of Celano or St. Bonaventure and many black and white plates illustrating them which are reproductions of paintings by Italian masters from the XIIIth to the late XVth century.