On my MacBook Pro (15-inch, 2017) running Catalina I have only one audiobook and it's in the Books App. Until now that was all that was in my Audiobooks in Books. But recently I noticed that my SSD 500GB has only 11 GB available. So I started to manage my storage by deleting documents and photos. Then I noticed that ALL my music from Music is now also in Books as Audiobooks! As far as I can see each of those files in Books is taking up space on my drive in addition to the same files in Music. I want to delete everything from Audiobooks except my one audiobook but I'm worried in case I lose any of my music from Music. I rang Apple but the advisor wasn't very sure about this either so I'm hoping someone here knows how this works.