J
It is possible that the book of Enoch (or 1 Enoch) is pseudepigraphical, meaning that someone other than Enoch wrote that book.
i dont think books like Enoch were ever meant to be written down in the first place. most of those people in the old times, from what i have studied, preferred to hold the teachings orally and the teachings were only preserved by those that were truly worthy. a translator or scribe that doesnt even believe could very easily copy a scripture.