thank you for your reply. I'm using v 2.0 Pro. Here's a few scenarios I have tried:
* Set books category access: Registered.
RESULT: Registered users can see the books when logged in -> All good.
* Set books category access: Super Administrator
RESULT: Super Administrator AND Registered users can't see the books.
* Set books category access: Registered, Author, Editor, Publisher, Administrator, Super Administrator.
RESULT: No one can see the books
So the catalogue is only visible to registered users. All other users with higher permission can't see it.