I'd like a plug in for managing hierarchical tags. Something to make the rules how to make hierarchical tags. For example if a book has tag vampire create a tag Paranormal.Vampire or maybe even something like this Genre.Paranormal.Character.Vampire, Genre.Paranormal.Character.Wizard etc.
If a book has Contemporary and Detective add it to Contemporary.Detective.
Now you need to add tags like Paranormal.Vampire manually and any new book will not have correct tags. Unless there is a way and I don't know it.