Playing with a two-level view, with the idea of using the smoosh as a map of the entire book (or chapter), but also being able to see the selected page big enough to actually read it.

Move the mouse left and right to go through pages.  To change the relative sizing of things, drag up and down, or resize the browser window.

I was thinking of this for the Big Wall though, not for the mouse.  In particular, being able to scroll the pages left and right by leaning your body left and right (like the film thing that RMO put on the big wall for Silent Night), but also being able to shoot a laser beam to the smoosh to jump to a position.  So, relative movement with your body, and absolute movement with your hand.

Currently, the selected page scrolls to the center.  If you want to see what it looks like when the selected page is aligned with the smoosh's selected page:

http://worrydream.com/DoubleLenticularCartography/?align=1

(This is how I originally imagined it, but I ended up not liking it.)