That Revelation book was SO HARD to understand. I couldn't get it at all. There was so much read into these Scriptures, this ancient text means the modern FDS. The symbolism would give me migraines.
How about "Jehovah's Witnesses and the Question of Blood." We studied that book in Book Study and and then a couple of years later we studied it again. "We will take certain things, but not certain blood products...." "Blah, Blah, Blah."