I sync "All books" from my iOS device (an iPod Touch) and my Mac, in iBooks.
When I delete a book in iOS, it is NOT deleted on my Mac. Instead, in iTunes, the setting changes from sync "All books" to sync "Selected books", with the deleted books unselected.
Instead, I want to keep it to "All books", and delete books I delete on my iOS device to also delete on my Mac.
Is this possible, and if so, how can I do it?