This document provides an introduction to the Hebrew Book of Enoch, also known as 3 Enoch. It discusses the manuscript sources, related literature, contents, origins and date of composition. The introduction also examines concepts in the Hebrew Book of Enoch such as the figure of Metatron and its angelology. It provides context on the book's conception of Metatron in relation to other mystical and apocalyptic works. Finally, the introduction surveys ideas in the Hebrew Book of Enoch involving spirit, soul, divine judgement and celestial songs.