Thread: Blank PDF from epub--Windows 7
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Old 07-17-2012, 01:12 AM   #7
davidfor
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Quote:
Originally Posted by maiki View Post
Kobo does not have a proprietary version of EPUB. They sell books in completely standard Epub format, which will read well on any Epub reader, including that of Calibre.

I had the same problem though, in trying to convert one to PDF with Calibre. Just the cover followed by empty pages (in the resulting PDF).
Actually, Kobo does have a proprietary version of ePub. It is commonly called a "kepub". If you look at one of these on Kobo Touch ereader, it will be listed with the type "KOBO EPUB" and the file extension is "kepub" under Windows. These cannot be handled by calibre. As the OP here was originally reading the book in the Kobo desktop application, the format being used was definitely a kepub.

From a little looking at kepub's, some are just ePubs, but most have the text sections encrypted. They also seem to have some code which I assume is Javascript. I suspect that if you changed the extension of a a kepub to epub and tried a conversion in calibre, you would see the results described here and in your thread.
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