An encyclical letter which claims to have been written by one “Jude, a servant of Jesus Christ and a brother of James”, i.e., a brother of Jesus, warning against the heterodox teachings which were in circulation among the faithful. This book makes references to two non-canonical books, The Assumption of Moses which provides an account of a dispute between Archangel Michael and the devil over the body of Moses, and the Book of Enoch, from which it quotes a prophecy attributed to the Patriarch Enoch, of the seventh generation descended from Adam.