Thread: Epub files suddenly not opening?
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Old 06-21-2021, 07:25 AM   #26
KevinH
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If they are iBooks epubs, and you bought them through iBooks or iTunes, they can only be read by iBooks due to DRM.

If you bought them someplace else and stripped the DRM or they were DRM free, and only read them in iBooks, iBooks may have unzipped those epubs into a folder and renamed that folder with a .epub extension. If so, you may be able to use an epub zip tool on your mac to re-zip them up back into an actual epub file before copying them to your PC where they should work just fine in calibre.
Last edited by KevinH; 06-21-2021 at 07:28 AM.
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