The compelling story of a Franciscan monk's journey from the Roman Church to the Orthodox Church. When he is unable to get adequate answers from his spiritual father, he seeks answers from the Church Fathers (though he is told not to read them, but only to read the pronouncements of Popes). This leads him to new realizations and to the Orthodox Church, in which he becomes the Bishop of Nyssa.
http://www.oodegr.com/english/biblia/Ballester/perieh.htm
Chapter 3:The Monarchy of the Pope
Chapter 5: The Beginning of the Dispute
Chapter 6: "Come Out of Her, My People..."