How Do I Push Metadata into a Book File?
I've got books that I've converted to EPUB, some of which I've since tweaked directly with Sigil, and now I'd like to update the metadata (individually and in bulk) for some of them.
Everything looks good in Calibre, but when I open the EPUBs with Sigil, the new metadata isn't there.
Is there any way to push the metadata into the EPUB files?
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