Merging different versions of *same format*

SteveG23 · 06-25-2026, 05:22 PM

I suspect this just can't be done in Calibre -
I sometimes have more than one .epub verion of the same book - e.g., one with illustrations and one without, one that is more complete but another with a better table of contents, better proofread, etc. I'd like to be able to merge the .epub versions into one record without deleting one of them, but can't find a way. This would especially be useful if one of them is several MB in size and the other slimmed down, and I want only the smaller one on a particular device where space is an issue. Renaming one of them doesn't do it. Saving one of them in .epub only, and the other in (say) .mobi only, would be a clumsy workaround. Keeping them as separate records isn't horrible, but makes it harder to tell if I have accidentally kept actual duplicates. Am I overlooking an option?

Karellen · 06-25-2026, 05:37 PM

Save them in the Data folder for that library record.

06-25-2026, 05:22 PM	#1
SteveG23 Junior Member Posts: 6 Karma: 10 Join Date: Apr 2012 Device: iPaq - MS Reader	Merging different versions of same format I suspect this just can't be done in Calibre - I sometimes have more than one .epub verion of the same book - e.g., one with illustrations and one without, one that is more complete but another with a better table of contents, better proofread, etc. I'd like to be able to merge the .epub versions into one record without deleting one of them, but can't find a way. This would especially be useful if one of them is several MB in size and the other slimmed down, and I want only the smaller one on a particular device where space is an issue. Renaming one of them doesn't do it. Saving one of them in .epub only, and the other in (say) .mobi only, would be a clumsy workaround. Keeping them as separate records isn't horrible, but makes it harder to tell if I have accidentally kept actual duplicates. Am I overlooking an option?

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06-25-2026, 05:37 PM	#2
Karellen Wizard Posts: 1,857 Karma: 9600930 Join Date: Sep 2021 Location: Australia Device: Kobo Libra 2	Save them in the Data folder for that library record.

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