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Turtle91 · 07-02-2021, 07:40 AM

I agree with Jellby - If you have the original HTML files, just add them to Sigil (or Calibre). Using that software when you update the html files will automagically create the proper files for ePub. If you only have the mobi files, then use Calibre's convert option to change mobi->ePub, then use Sigil/Calibre to clean up or update.

I do remember hearing that you should NOT use a raw Calibre converted ePub to submit to kindle for some reason (I don't remember why), but if you clean it up and run epubcheck then it works fine. Hopefully someone else can fill in the details.

Welcome to MR!

07-02-2021, 07:40 AM	#4
Turtle91 A Hairy Wizard Posts: 3,369 Karma: 20212733 Join Date: Dec 2012 Location: Charleston, SC today Device: iPhone 15/11/X/6/iPad 1,2,Air & Air Pro/Surface Pro/Kindle PW & Fire	I agree with Jellby - If you have the original HTML files, just add them to Sigil (or Calibre). Using that software when you update the html files will automagically create the proper files for ePub. If you only have the mobi files, then use Calibre's convert option to change mobi->ePub, then use Sigil/Calibre to clean up or update. I do remember hearing that you should NOT use a raw Calibre converted ePub to submit to kindle for some reason (I don't remember why), but if you clean it up and run epubcheck then it works fine. Hopefully someone else can fill in the details. Welcome to MR!