So most of the book pages were back on the floor. They were stuck to each other, but not the ceiling....
Next we took wallpaper paste and put that behind all of the pages. The next day the pages that had stayed up with the adhesive fell down and we had to put them back up.
On the third or fourth try, we ended up fixing the pages with mod podge and then coating the top with the mod podge as well. We also staples the edges. It took many attempts, but we finally got them up there!