Thanks for the suggestions Jongware!

On #1 – I wasn't really sure if I trusted them to do the scaling/adjusting on an 88 page book. Who knows what I would end up with. I guess I just have control issues.

Thought about #2 before I posted the question. Didn't like the idea of having to make changes & make another PDF (as you also mentioned). Too many steps.

I actually ended up doing what you mentioned in the last part of your post – scaling the text frames manually. Although quite time consuming, this gave me the most control of all my page elements throughout the document. I was very surprised and rather impressed at InDesign's ability to see each text box as a single unit & scale accordingly even though there was text flowing from box to box on each page.

BUT, what I am very interested in, now that you mentioned it, is #3. How do I get ID to place another ID file & place the imported pages onto my new document pages all in one command. When I make my box in my new doc & place the original file, it just drops in the first page like a graphic & stops. How do I work the magic of putting the complete original file into a new document all at once. And can I have it scale the original pages to fit the new page size when I place it? Now I'm very curious as to how #3 would work.

Thanks!