WHERE does iBooks save PDFs added to your Apple Books Library on your Mac?
I'm using iBooks 1.5 on OS X El Capitan. (And iOS 13.3.1 on my iPhone.)
I read somewhere that all files (both ePubs and PDFs) added to your Apple Books Library are saved in
~/Library/Containers/com.apple.BKAgentService/Data/Documents/iBooks/Books
However, only a book I purchased a while ago and a Books.plist file are in that folder on my Mac. That Books.plist file does contain references to the PDFs I currently have in iBooks, including each PDF’s source path (where on my Mac the PDF was when I originally added it to iBooks), and their iBooks(?) path:
~/Library/Mobile Documents/iCloud~com~apple~iBooks/Documents/[filename.pdf]
But opening "Mobile Documents" in Finder actually opens "iCloud Drive", and those PDFs are nowhere to be found in it!
Thanks in advance for any useful information.
MacBook Pro 15", OS X 10.11