Apple Books
After reading a lot of posts, messing around with Settings and reading other info online, I finally figured out that if you purchase a book from Apple Books you cannot permanently delete it. Remove Everywhere only seems to apply to books sampled but not purchased. You can hide a purchased book but that's all. The file remains in iCloud using up storage space and your only option is to purchase more storage.
What I want to know is why? Why can't a purchased book - audio or otherwise - be permanently deleted? Until Apple changes this policy I won't use Appple Books any more.
iMac 21.5″, macOS 13.3