Quote:
Originally Posted by pluma
This is what I want to do:
unzip, change content, re-zip it.
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You can't simply re-zip epub3 books, because they need to be zipped in a specific way. (Instructions vary from OS to OS.)
Quote:
Originally Posted by pluma
Also is not possible to delete stuff at will because some items are referenced across multiple files!!
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You can use
epubcheck (or the offline version by
Pagina) to detect some of these issues.
Quote:
Originally Posted by pluma
My first impression is that the text inside an epub zip is unreadable!!
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That usually only happens if the epub is DRM-protected. Otherwise you should see standard (X)HTML files.