Digital flip book (html5)

General information for the website: digital flip book (html5) Description of requirements/features: Hi, Looking for a digital flip book (HTML 5 not Flash) creating from a pdf. The big issue here is we want to do the following: 1. Starts A4 portrait, then opens to an A3 spread 2. But then the next page opens from the bottom - the 'whole' of the bottom of the A3 spread flips, so it turns into A2 Portrait. I'm looking for quotes on this and timescales. Extra notes: