MobileRead Forums - View Single Post - Why does changing ISBN for one format change all?

peterdanckwerts · 11-01-2011, 01:14 PM

I've just converted an ePub to mobi. When I try to change the ISBN for the mobi file, Calibre changes the ISBN for the ePub as well. This isn't actually a problem as I still have the original ePub, but surely Calibre shouldn't do it. The ISBN should be different for each format, just as a hardback book has a different one from a paperback.

11-01-2011, 01:14 PM	#1
peterdanckwerts Junior Member Posts: 2 Karma: 10 Join Date: Aug 2011 Location: London Device: ipad	Why does changing ISBN for one format change all? I've just converted an ePub to mobi. When I try to change the ISBN for the mobi file, Calibre changes the ISBN for the ePub as well. This isn't actually a problem as I still have the original ePub, but surely Calibre shouldn't do it. The ISBN should be different for each format, just as a hardback book has a different one from a paperback.