In the last two weeks I have photoread Augustine's City of God, Aquinas' Summa Theologica, and the Old and New Testaments. My experience in Photoreading these works was no different from my experience reading Plato, or Sophocles, or Dante, or Marx, or any history books, or any self-help books.

I do my P/R at night before bed. The method has the same effect on me whether what I read is religious, philosophical, self-help, or other.