The document discusses the biblical canon and endorsement of books by various apostles and disciples. It notes that Peter endorsed Paul, Paul endorsed Mark, Mark endorsed Matthew, and Matthew endorsed John. Paul also endorsed Luke. It then lists various books and the apostolic authority behind each one. These include the gospels of John, Jude, Thomas, and Peter's first letter. The document also briefly discusses how early Christians copied books in codex form and how the canon was established at the Council of Nicaea to argue against heresies.