The one that Lantz mentioned is cool! But it requires you to enter raw text and images and then converts that to a flip book.
The second one I mentioned involves a license key or a watermarked and limited flip book. Other than that it’s really straightforward and easy to use.
Seems like the idea would be to essentially cut the PDF into pages. Put each page onto its own canvas. And then flip between canvases with flip JS. I am still interested in solving this because it’s a cool plug-in in a cool idea. I’m gonna keep looking