I think I read almost half the scriptues in Revelation refer to the Old Testament which your right Doug does make it a very Jewish book compared to the rest of the Gospel. Some say that John the Evangilizer, the Apostte, and John from the Isle of Patmos were three different people. The differences of style between the book of John and the Revelation make scholars think they were different people, and others do believe it was written by the Apostle who would have been an old man by that time.
I forget what the 'Babylon The Great Has Fallen' book said as to who wrote it. I am sure with their emphasis on 1914 at the time that books been long disgaurded, ancient history kind of like I am becoming.