I recently started using family sharing to share audiobooks with my family and partner. I wanted to manually select which audiobooks to share by visiting Amazon's "Your content" page.
When I visited that page, to my horror, I had ~800 New York Times Audio Digest "audiobooks", one every day for the past ~2 years, to which I never listened. These entries crowded out my actual audiobooks, making it unfeasible to actually choose and share anything.
Amazon's page also makes it very difficult to clean this up: