Catalina messed with my Books

About

Catalina is very reliable and easy to use OS - having that said, Books, Music and TV Apps keep driving me crazy.

This time Books.app stopped syncing. Of course with out any recognizable problem. No alerts displayed in any way. And Apple does not make it easy to solve puzzles like this. The whole iCloud Books syncing is a darn black box.

What I did to find the problem

• Made sure my iOS-devices were syncing OK
• Made sure my Mac was signed in to iCloud
• Performed some rituals…
• Took a look at ~/Library/Mobile Documents/
• Found two suspiciously looking folders…
  

What I did to solve the problem

…and trashed one of them…

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