Originally Posted by DiapDealer
Unless they're fixed-layout epubs, the originals have no "pagination format." They're reflowable documents.
If you're addressing my response all I can say is I've never to my knowledge had an ePUB that was not reflow(able). Therefor the method I suggested has been used (by me) only on reflow(able) ebooks. It outputs a document in PDF format that matches exactly the pagination that appears in the viewer.