[Request]: Make collections of which a book is a member available as metadata

[banj]

Feature Request Checklist

• [X] I have searched the existing issues to avoid duplicates

What feature would you like to request?

I thought I'd seen another request that touched on making more metadata available from the import. This request would probably also be served by #41 , but I'm looking to update my template to add tags in the front matter to relate books together. A good solution for me would be if the collections that a book is part of in Apple Books was made available as part of the import metadata.

For example, in Apple Books, I have a collection for "Science Fiction" and another for "Fantasy", and I'm free to put any book I like into either or both of these. If these collections were available as metadata, I'd be able to include them as tags and cluster together the highlights which share common collection entries.

Thanks for considering!

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