The Acts of Barnabas is a non-canonical pseudepigraphical Christian work that claims to identify its author as John Mark, the companion of Paul the Apostle, as if writing an account of Barnabas, the Cypriot Jew who was a member of the earliest church of Jerusalem; through the services of Barnabas, the convert Saul was welcomed into the apostolic community. Three pseudepigraphical works are linked with the name of Barnabas: the Epistle of Barnabas, written between AD 70 and 135, this Acts and the medieval text Gospel of Barnabas. None of them have been accepted into the biblical canon. Source: Wikipedia (en)