Who Wrote the Book of Revelation and the Fourth Gospel?

Speaking of the Apocalypse (from the previous post giving that odd video): Someone recently asked me if the same author could have written both the book of Revelation and the Gospel of John. Interesting question! Traditionally, both books have been identified as coming from the same person, John the son of Zebedee, the fisherman who was one of Jesus’ closest disciples. In answering the question I would like to stress two points: first, they almost certainly were not written by the same person...