You're the only person I know who has published something, so I think your advice would be invaluable toward a project like this.

A second prompt book would be cool, I love the idea of choose your own adventure books though, I was thinking of doing one myself but havent nailed the idea down yet. I'm going to follow them and check them out.

100%, we'd definitely want to steer clear of AI because it just isn't a good look for a book.

The ISBNs I think woule be necessary as the intention would be to be self suffient and hopefully try to get the book into shelves, and getting a few copies into Libraries would also be good. I think having them from the get go would be a good way of starting strong, rather than having to go back and cross the bridge down the line.