I hope this previous reply is useful: "What happened to the scribes and monks after the European printing press became common? Did they campaign for it to be banned and destroy presses?" , replies by /u/sunagainstgold .

This is just a starting point, not to discourage further questions, data, or debate.

If I may add a follow-on of my own: sunagainstgold, who were the primary producers of books just before the printing press? "The majority of monastic textual production was not commercial but in-house" could conceivably mean that monasteries were indeed the major producer of books but internal uses were much larger, but that seems unlikely -- were secular scribes then the major book-copiers at that point?