Quote:
Originally Posted by cmarteag
OS: Ubuntu 26.04
Calibre version: 9.1.5.0
When importing a library of 152,080 EPUB files into Calibre, 41,083 books are listed as having an "Unknown Author." The database contains folders for each author with all their EPUB files, but the author's name is missing. How can this problem be resolved without having to process the books one by one?
Many thanks.
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What you can do is edit the metadata in the columns for these books and then use Modify ePub to update the metadata in the ePub.
Don't use any of the plugins to download the metadata as you still have to check that what you get is correct. Also, if you try to download metadata for too many books at once, you can be blocked. Also, a lot of the plugins no longer work because the sites have implemented blocks. There is a possible solution in the latest calibre, but the plugs would have to be updated to take advantage of the possible solution.
This is going to be manual solution. There's no way around it.