Adding new card metadata

I have a deck for my daily vocabulary. I noticed that pressing Ctrl+Shift+I on a card entry shows up its saved metadata (when it was created, latest revision, etc).

I was wondering if it’s possible to add to this metadata an entry to know from which book I got that vocab. What is the best way to do this? A possible workaround would be to just separate vocab by books. But is there another way?

Thanks

Such metadata can either be given with a tag, or by adding an extra field to your notes.