I have recently started reading Guido Stucco’s The Colors of Grace:  Medieval Kaleidoscopic Views of Grace and Predestination.  It picks up where his last book, Not Without Us, left off.  I just finished Chapter 2 which gives the views on grace and predestination of historical characters like Pope Gregory, Isidore of Seville, and Pope Hadrian.  If the theology of grace and predestination is a subject of interest to you, I recommend picking up a copy of this book tracing the history of these topics in the early middle ages. Pax tecum, Frank.