fail to import isbns to Calibre and get the metadata
I have a large number of children's books and their isbns, and i need to import these isbns to the app Calibre then I can get the publication date, publisher, weights, cover image, reading age range of every book i imported and other information. But i tried several times to add books to Calibre by importing ISBNs and all failed, and i can't download the metadata and the cover of my books?How should i do? Can anybody show me the specific reasons and steps to do it?
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