Why this tax on books?

A few days ago, for academic purpose, I purchased three books from Germany and ordered home delivery through FedEx courier service. I paid for the books online. When the delivery van of FedEx came to my office, I felt delighted, but to my surprise, the deliveryman handed me a bunch of papers called 'shipment arrival notice.' The shipment notice stated that I had to pay the stipulated 'tax/custom/duty' levied on the books and clear the shipment from the Customs House at Hazrat Shahjalal International Airport or I had to authorise FedEx to do the same on behalf of me. Eventually, I authorised FedEx and paid taka 991 as tax on the books.
Can the authorities concerned do anything to review the imposition of taxes on books and revoke them for the interest of the nation?