2. Internally, John’s authorship is attested by the book of Revelation itself.2 And externally, John’s authorship (and indeed even the Apostle John’s authorship) seems to be upheld by many of the early Church Fathers. Such would include: Justin Martyr, Melito of Sardis, Theophilus, Irenaeus, the Old Latin translation, the Muratorian Canon (= Caius?), Tertullian, Clement of Alexandria, Hippolytus, Origen, Methodius, Pamphylius, Athanasius, Gregory Nyssa, Jerome, Augustine, Theodoret, Basil, Gennadius, and many others.3
3. The book of Revelation itself makes it clear that God in Christ (through His Spirit) is Himself the Primary Author4 of that document. However, under that Triune God, the Apostle John is the sole ‘secondary author’ – and therefore the (one and only) human author of the book of Revelation. Indeed, most scholars have never even questioned the Apostle John’s authorship of the last book of the Bible.