How can I convert a widget-heavy iBook to work on Amazon, Android or other platforms?

I am tearing my hair out looking for a way to get a large, image heavy iBook with gallery widgets to convert to sell on Amazon, Barnes & Noble, Android etc. Exporting the book to sell in PDF format is completely pointless as the book needs to be interactive. I would be happy to copy and paste 147 image/widget filled pages from IBA into a blank page of some other programme if I though it worked. Anyone have a solution?