: Re: Can EPUB 3.0 be viewed on EPUB 2 devices This prior question is about the differences between EPUB 2 and EPUB 3. What is more interesting to me, as an owner of three different EPUB 2 devices,

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Your best bet is to ask before you buy.

It depends on the reason the book was released in the EPUB 3 format. If it's a static text, and the publisher was only trying to follow the latest guidelines and standards, they may have added the extra bits required by the older standard, so it would degrade gracefully and be available to more customers.

If, on the other hand, the book was released as an EPUB 3 in order to take full advantage of the standard's dynamics and interactivity, it's likely that the publisher didn't add the required legacy information. They might have pegged a particular device, to ensure that the book would function predictably. For example, Walrus Books released H.P. Lovecraft's novel, "Kadath", for the iBooks app in EPUB 3. It is highly interactive and intended for the iPad. They had no reason to make it work on other devices, and probably didn't bother with legacy shims.

Regarding your question about software, I'm not aware of a good GUI for creating EPUB 3s. I use Dreamweaver to modify the HTML, CSS, and JavaScript code directly, and ePubPack and 7zip to pack and unpack it. Then I test it with ePubCheck.

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