As to 'collected works' it was the least clumsy thing I could think of.
Actually I like "Collected Works" (that's what it is, after all), I just wasn't sure how it would go over with people who don't know you.
I think the "what if"'s should definitely go in there.
Dare:
I"ve also seen reviews on the first few pages of a book - before the title page. That may be an option as well.
John DeWitt:
As far as I know, there's no way to put text on the insides of the covers, so it would have to be additional pages.
I've seen text on the inside of a paperback cover, but not a hardback.
Additional pages sound good to me too. (But two pages, right and left side, are sufficient, including the "what if".) Don't think Claire's Intro should be a part of it.
OK, I can see where this would work with the two covers as Madame Axe did them. Forget the other stuff I said.