Hello,
sorry, we in Book library upgrade - we give some variants:
ordasoft.com/News/Book-Library/upgrade-b...n-to-20-version.html
What exactly you use ?
Please go to book library and check some books - they is publish, they is approved ?
Please check categories for that book - they is publish, they is approved ?
What access level set for categories ?
please for some book - check connected book to categories
Thanks,
OrdaSoft team