Of Enoch: The Book

Explicitly quotes 1 Enoch 1:9 as a prophecy.

A treatise on celestial mechanics and a 364-day solar calendar, revealed to Enoch by the angel Uriel. The Book of Enoch

Recounts the rebellion of the "Watchers" (angels) who descended to Earth, married human women, and sired the Nephilim (giants). Explicitly quotes 1 Enoch 1:9 as a prophecy

If you are looking for a physical copy or deep-dive commentary, several modern resources are available: Enoch in the Old Testament and Beyond married human women

References themes of fallen angels being cast into "gloomy dungeons".

Contains the "Animal Apocalypse," where the history of Israel is represented symbolically through different animals.

Despite its popularity, it was eventually deemed (written in another person's name) and non-canonical by mainstream Judaism and the Roman Church. Key reasons include: