I was surprised at how much of the "Revelation " book was just a complete rehash of Judge Boozerfords book "Light" from the 1930s.
Updated to hide their mistake about the Hague court of International Justice founded at the turn of the century being the "Beast that was" - change of the great crowd to earthly class (despite Freddie claiming to understand greek).
That' s about it.
Franz wrote most of these, and let Rutherford take the credit. That lie alone shows how christian they really were.
If you ever read "Vindication" the new Ezekiel book rehashes a lot of that too, with changes to hide their errors and misrepresentation of facts.
HB