Jep, i am really salty about that too. I used to store my Calibre library in the documents folder (where else would it live, right? Free backup included!). A w

Jep, i am really salty about that too. I used to store my Calibre library in the documents folder (where else would it live, right? Free backup included!). A while ago I discovered several book folders nested in the library that should contain the actual epub files… are empty. The directory structure is there, the database entries are there, but the book files are gone. Not all of them, just about 40%, at random. Moral of the story, don’t store anything in iCloud Drive you like, especially not your books.