Authors are advocating that used bookstores pay royalties for the books they sell. This would require an amendment to the Copyright Act which codifies the First Sale Doctrine. The First Sale Doctrine allows anyone who buys something the right to resell their property without permission of the original copyright holder. Requiring the reseller to pay a royalty on that item would require new law.
Because of limitations on digital copies, resale of digital purchases are not allowed. It looks like novelists want to impose similar restrictions on physical property. I hope that Novelists Inc. and other organizations move to require libraries to also pay a royalty for every book lent. I think that would really revitalize the publishing industry. //sarcasm off.