I am ordering two books, Upon This Rock and Jesus, Peter, and The Keys which of course deal with the Papacy. Could anyone here suggest any other books on the subject?
These two aren’t necessarily about just the Papacy, but do delve into it a bit. Scott Hahn’s Rome Sweet Home & Catholicism for Dummies would be two good books to add to your lists. And when you get done with those you may want to pick up the 3 volume Radio Replies series. These books are about general Catholic theology and apologetics.
These two books by Fr. Stanley Jaki are very good:
“Upon This Rock” is a really good book. I doubt you’ll need anything beside that one.