This work provides the key to one of the most enigmatic Jewish Hellenistic texts preserved in Greek and Slavonic. "3 Baruch", properly read, significantly enriches our understanding of the history of the motifs found in early Jewish lore, at times providing missing links between different stages of their development, and preserves important evidence on the roots of Jewish mysticism, proto-Gnostic and proto-Christian traditions. This is a new volume of a much valued commentary series. It provides the key to one of the most enigmatic Jewish Hellenistic texts (so far neglected by modern scholarship for its complexity).