Quote:
Originally Posted by Ripplinger
As far as I know that information is not within the epub itself in any of the files. That extra info is always downloaded from other sources such as Amazon, Goodreads, etc.
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Wrong. I drag a book into calibre and at once get all kinds of fields filled: Author, Title, Tags, Publisher, Publishing Date... All this info comes directly from file contents (as set in my prefs). If I feel like it, I download metadata from Calibre button and see what it offers.
Drawbacks are that I get too many tags (General and Fiction are constantly reappearing on my tags list), only those fields I have common with other people get filled (Series, but not CoverArtist).
So yes, first checking metadata and then adding to Calibre makes sense to me.
I'm not sure how much of it could be achieved from Calibre and Sigil. There's a 'i' button on Edit panel that reads metadata from the file, so maybe one step OP could save is re-adding. Just leave it in Calibre, do your thing on the other copy and then drag into book Book Details panel. Open Edit and hit 'i'.