It was a crazy idea. Why not put a flip book into a paperback novel?
After I designed the cover for a science fiction book Quozl by Alan Dean Foster (1989, Berkley Books), I proposed including an animated sequence inside the pages of the book.
The story was about long-eared aliens called quozls that come to Earth and end up starring in a Saturday morning cartoon. It seemed a perfect reason to try out the flip book idea.
I did 100 pen and ink drawings for the animated sequence. It starts out with a spacecraft landing. The hatch open and a quozl climbs out. It walks over to a skateboard, steps onto it, does a flip, and ends up sitting on the skateboard.
The press technicians worked hard to keep the pages lined up so that the animation didn’t jump around too much.
If the idea didn’t become more widespread, perhaps it was just because it was just too much work and too much cost.