Quote:
Originally Posted by John Laidler
So I have just gone onto Amazon and downloaded my mobi file again and used Calibre to change it into an epub which I could open and view in Sigil.
This is where it gets interesting, because the opf file I uploaded had no references to the cover but the opf I have extracted from the downloaded mobi file does! Clearly, in the conversion process Amazon has put in the opf the entries which were missing. They have also added the missing cover.jpg in the list of images.
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Don't assume that
Amazon has added anything, there. The conversion to epub (whether converting with calibre or "unpacking" with KindleUnpack) can just as easily be responsible for those opf additions/changes. Both processes tend to try and create a "standard" epub from the binary contents of a kindlebook (including creating an html cover-page from an image that was clearly intended to be a "cover"). KindleUnpack has an option to dump the raw content of a Kindlebook if you really want to see what Amazon has done to your original epub!
