Earlier quoted context omitted.
As far as I know, the Incas had a lot of books, not the Mayans. The Spaniards burned them for considering heresy.
The Incas didn't have writing: https://en.wikipedia.org/wiki/Inca_Empire (They did have a knotted string message system, but it couldn't contain full language: https://en.wikipedia.org/wiki/Quipu .) The Maya did have writing: https://en.wikipedia.org/wiki/Maya_script If you don't know, and don't want to spend a few seconds searching, asserting things doesn't contribute to the conversation.
Sorry about that. I just repeated what I heard from a professor that was around. And he is a historian. It seems that having higher education sometimes doesn't mean much