The problem is that thumbnails can display only a window-height limited list. The page you want may be well beyond that list in either direction.
It has it's own scroll bar, Jim.
Easy to zip through it, without changing the page you're on until you find the one you want to go to. I've got a 267 page document open in Pages '09 at the moment - another book by Lorraine's husband which I helped her format.
So...Lorraine - are you using Pages '09 (the NON-crippled version) or the new "improved" (not) Pages 5?
Pages '09 is as Jim shows. Pages 5 does NOT have the page number box at the bottom of the page - so there is nothing to click on to go to a different page. It DOES, however, have the thumbnails and they're available through the View menu as before, and have a scroll bar. However, they don't appear to show facing pages as the old Pages does.
Ok - so back in the bin with Pages 5, now that I've looked at it again. They do appear to be gradually putting back some of the missing features, but they're not all there yet and I'll stick with '09, thank you!