For the sake of Thor...do not create epub with pages using jpg/rasterized images. At work, I'm watching some titles being converted to such format and it can be slow to render on screen depending on your device [assuming it's not optimized for your devices]...I can't image anyone wants to pay for this reading experiences and not the actual books for a few bucks more.
Seriously, if you must....there is nothing wrong using pdf...most tablets supports it and resolves a lot of text/design issues. I can't understand why epub is even the rage...screens too small then wait and allow for larger portable screen technology to solve that problem. This rush with epub is creating a lot of badly formatted ebooks. Let's not to forget dropping a lot of useful content when converting from already published books...simply because the limits of epub at this point in time.
Sure, it's a new format and every publishers wants to get a piece of this new revenue...but at the price of not having a vision and true understanding of the technology [devices] driving behind this. Amazon got the early start and watch how much of it's ebook market has lost since the waves of tablets hit the marketplace?
It is not the format or even content that is real driving force behind epub. Consumers and this hording culture of ours...would care less and most don't even understand most epubs are dumb down content or re-purpose stuff from existing materials. Of course, this is not to say end users don't like it...for pure readers, all they need is straight text and in this sense...badly formatted epub works well even for them.
Sorry, I digressed from the topic...
