Book of Enoch is an ancient Hebrew apocalyptic religious text attributed to Enoch, the great-grandfather of Noah. It delves into the origins of demons, giants, and fallen angels, providing insights into the moral necessity of the Genesis flood and prophetic revelations about the Messiah's reign. Dating back toBC, the text is divided into sections like the Book of the Watchers and the Book of Parables, with fragments found in Dead Sea Scrolls and quoted by early Christian authors.

The Book of Enoch, not part of the Jewish biblical canon except for Ethiopian Jews, is known in Ge'ez, with Aramaic, Greek, and Latin fragments. While some Christian denominations find historical and theological value in it, others consider it non-canonical. The most complete version, from Ethiopic manuscripts, was translated into English in the 19th century.