Quoted in the Bible. Banned from it.
The New Testament quotes it by name: "Enoch, the seventh from Adam, prophesied…" (Jude 14). The earliest churches read it. Then the councils came, and the Book of Enoch was left out of the canon of the West.
It should have vanished. Instead it survived two thousand years in the mountain monasteries of Ethiopia, copied by hand in Geʽez, complete: the Watchers, the two hundred angels of Mount Hermon, the Nephilim, the judgment to come.
Read the book they left out. Decide for yourself.