>>716291853
The Mayans had huge libraries of books that they made with tree barks, but they were subsequently destroyed when the Spanish started an Inquisition on the Central American natives. The only thing left was the Mayan calendar text, so we may never actually know the extent of knowledge and stories we have lost.

Funnily enough, the way we translate Mayan ruins today is through the Inquisitor's logbook, in which he wrote down the Lexicon of the Mayan alphabet.