I didn’t say the introduction mentioned the Trinity but it was written by someone who promotes the Trinity against non-Trinitarian “cults”. Ray Franz didn’t even allow Randy Waters to sell his book because he was a Trinitarian. Just saying. It’s not what you think, it’s what Ray Franz would have thought.
The other question is who holds the copyright of the Great Crowd booklet?
Plus if the appendix really contains single pages from ISofCF that doesn’t sound terribly practical or helpful. Why not simply republish the book?