I. Seth in Jewish literature -- The Masoretic text -- The translations of the Old Testament -- Genesis Rabbah -- Pirke de Rabbi Eliezer -- Zohar -- Summary of traditions in the synagogal literature -- Jubilees -- VIta Adae et Evae -- The apocalypse of Moses -- Other Jewish pseudepigraphical writings -- Summary of traditions in the pseudepigraphical literature -- Josephus -- Philo of Alexandria -- Seth in Jewish literature -- II. Seth in Samaritan literature. III. The name of Seth and facts from his life in Jewish and Christian literature -- The name of Seth -- Facts from the life of Seth -- IV. Seth in Christian literature -- a. Traditions and knowledge going back to Seth -- Seth as scribe and astrologer -- The books of Seth -- b. The generation of Seth -- Greek authors, especially the Byzantine chronographers -- The cave of treasures and related literature -- The Syriac commentators -- c. Seth in Christian literature -- V. Seth in Gnostic literature -- The Sethians and related groups -- The Nag Hammadi library -- Other Gnostic sects and writings -- Seth in Gnostic literature -- VI. Final conclusions.