Originally Posted by JSWolf
That is wrong. It sends the wrong message to the publishers and public. If the DX had ePub, then they could get ePub validated. But nope, they had to go PDF only. Amazon is doing the public a disservice with the DX.
I disagree. ePub is not the holy grail. It would be nice if we could have one file format for all e-book purposes, but this is not how it is. Some content (in particular textbook content) is heavily designed around a particular paginated representation, and may not make sense to recast in a "liquid" representation. Digital publishing is not just about linear texts such as novels. And printing is not going away any time soon, either. The preferred representation for many books, magazines, and newspapers will remain high-fidelity PDF.