Catholic Encyclopedia - Apocrypha
The scope of this article takes in those compositions which profess to have been written either by Biblical personages or men in intimate relations with them. Such known works as the Shepherd of Hermas, the Epistle of Barnabas, the Didache (Teaching) of the Twelve Apostles, and the Apostolic Canons and Constitutions, though formerly apocryphal, really belong to patristic literature, and are considered independently. It has been deemed better to classify the Biblical apocrypha according to their origin, instead of following the misleading division of the apocrypha of the Old and New Testaments. Broadly speaking, the apocrypha of Jewish origin are coextensive with what are styled of the Old Testament, and those of Christian origin with the apocrypha of the New Testament.