[jhowell]

Originally Posted by odamizu

@jhowell: Not sure if this is what you mean, but I was downloading about 50 ebooks to my Kindle and 11 of them imported as KFX-ZIP. And yet, the KFX-ZIPs could be read in calibre, and when I clicked the "From KFX" button, the KFX-ZIPs converted to epub, albeit with errors (see spoiler below).

That can happen if one or more of the files that make up a book are not downloaded to the Kindle before importing it into calibre. That is most likely to occur if you quickly download multiple books without waiting for each to complete before starting the next one.

Originally Posted by odamizu

On quick look, the epubs appeared okay and could be read in calibre viewer despite the error report.

The missing files will likely contain images that will now be missing from the converted book. That could be important depending on the book.

Originally Posted by odamizu

Note: After the above, I went back and deleted the books from my Kindle, re-downloaded to Kindle, and when imported the new files into calibre, they imported as KFX and converted without errors. But I report the above since you expressed an interest in KFX-ZIP that could be read and converted in calibre.

Thanks for the report. I will add a note about this possibility in the plugin documentation.