While doing a google search for flip book (of course), I came across this great French web site with lot of interesting info on flip books. The really great thing is it's has an English version, also. Be sure to check out all the sections, especially the history and links sections. I'm adding them to my links and I've contacted them to see if my Dragonfly Flipz books can be included in their links.
I was floored to see a picture from 1911, that looks like my Dragonfly Flipz format, but the pages were cut into sections. It's a fun site, I'll be spending a lot of time there.