The Apocalypse or Revelation of St. John is an example of an apocalypse, apocalyptic literature was a literary genre that was actually pretty common among Jews of the 2nd Temple period, and it remained popular at least for a short time after that, also among Christians.
Apocalyptic literature is figurative, it is intentionally full of big, loud, symbolic and graphic imagery and language. Because the point of an apocalypse is, as the name itself means, unveil something, to lift the veil and say something important.
Focusing too hard on the trappings of an apocalyptic text is a bit like getting distracted by the colors on a street sign, rather than on what the sign is trying to communicate.
The Revelation borrows heavily from the language of the Old Testament, this is intentional. It is highly figurative and symbolic, rather than literal. Though it does contain literal things--the seven churches to whom it is addressed really are seven literal churches. But the apocalyptic, visionary writing is intentionally graphic and very symbolic. Jesus, when He returns, is not going to have a literal white horse; neither are their literal man-faced locust monsters in some hellish pit somewhere. There is no literal prostitute riding a literal multi-headed monster, and the text makes that very clear.
Understanding what kind of literature the Apocalypse itself is is really important. It's a specific kind of writing that is meant to be read a certain way.
-CryptoLutheran