This is the 4th book I've read on Pope Francis.  All of them have insights which may not be gathered from the other books.  But this book penetrates some very deep levels.  The section on Francis' experience as a notice and the example of his novice master left a permanent influence on him and prayer.  As Mark puts it quoting a former student of the pope:  "We got the sense that Zaragozi awoke in Bergoglio not just the habit but the rage for prayer that he has to this day."  further on Mark states: "The "habit," the "rage for prayer"--clearly, both the novice master and the novice saw prayer as a welcome duty that gave meaning to their daily lives."