Weird 70s flip books

You already know how much I love 70s stylin'. Check out this book for a great example. Look at her hair!

You flip the pages up or down at the point of the spiral binder, so you can create lots of weird combinations of different pictures. Here's another flipped version.

Love how psychadelic and weird this is. Has anyone else saved one of these? I can't find examples of them anywhere.