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

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

The book was highly influential among early Christians and is directly quoted in the New Testament:

Later rabbinic Judaism moved away from apocalyptic literature after the destruction of the Second Temple.

Recounts the rebellion of the "Watchers" (angels) who descended to Earth, married human women, and sired the Nephilim (giants).