The Book of Enoch is an ancient Jewish apocalyptic text traditionally attributed to Enoch, the great-grandfather of Noah. It comprises several sections, including the Book of the Watchers, which details the fall of angels known as Watchers who descended to Earth, intermarried with human women, and fathered the Nephilim-giant offspring that led humanity into corruption. This transgression prompted God to decree a great flood to cleanse the Earth. Other sections, such as the Book of Parables and the Astronomical Book, explore themes of divine judgment, the nature of the cosmos, and prophetic visions concerning the Messiah's future reign. Throughout, Enoch serves as a scribe and intermediary, receiving divine revelations and imparting them to humanity.

The Book of Enoch is historically significant as one of the earliest apocalyptic texts, influencing Jewish and early Christian beliefs on angels, divine judgment, and messianic prophecy. Though not included in the Hebrew Bible, it remains part of the Ethiopian Orthodox canon and inspired early Christian writings, particularly regarding the fate of fallen angels and the end times. Its themes shaped Judeo-Christian views on morality and eschatology, contributing to the foundation of apocalyptic literature.