How to show books with only 1 tag? Dynamic tag or virtual library?
I have a tag to classify all the non-fiction books; I also have additional tags to classify history, politics, science, IT etc, so a book can be tagged as "non-fiction; history", for example.
Is there a way to show the books which have only the tag "non-fiction"? This would exclude those which have 'non-fiction' and some other tag.
The easiest way would of course be to add a second tag called "other", but I was wondering if there's a smart way to do it with virtual libraries or if there is some kind of dynamic tag that could be used.
Thanks!
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