True - " You're saying you want to make a different version" Thought it would be nice to get my material out there for folks who don't have an iPad or Mac computer (but might have an iPhone.
True that the "scaling down to fit on the iPhone is all done by the iBooks app." But I’ve been playing around a bit with a few of my iBooks on my 5s iPhone exploring the user experience. A few initial thoughts:
1. The most natural way to hold the phone is in portrait - so that invites a portrait ibook. Perhaps with two columns of text. Landscape images, galleries or videos would require a 90 degree rotation to full screen.
2. Scrolling text boxes display best in portrait mode and open as an entirely new page. Makes me wonder if perhaps they could be used in a different way on iPhone
3. Pop over widgets open an entirely new page and loose their launch point. Disorienting on iPhone.
4. Interactive images work fine. Take on a new significance on iPhone?
5. Glossary - the text targets are very small, but the display of definition / image is great.