This is a little different execution of Robert Leger's approach on how to rig a popup book element...
Before watching this, you might want to check his video tutor first...you should definitely watch it ;)
motioneers.net/rigging-a-popup-book-element/

My Xpresso presets:
c4dtools.net/legoman-4d-accessories/
c4dtools.net/frames/
c4dtools.net/legoman-4d/
c4dtools.net/lego4d/
c4dtools.net/psr-animator/

Loading more stuff…

Hmm…it looks like things are taking a while to load. Try again?

Loading videos…