Answer: As per Mirror image Rule 11 says that an offer must be accepted exactly with no modifications. here you have offered your business law book for $50 and another person modified it by adding supplement into it. so it do not make a valid contrat as per Mirror image rule 11 as valid acceptance is not there.Let us consider the Mc Donald According to world trade organization intellectual property rights are rights given to persons or corporate over the creations of their minds i.e. what they have originally created on their own. Intellectual property rights usually give the creator an exclusive right over the use of his/her creation for a certain period of time. Some common intellectual property rights used in corporate environment are copyrights, patents and industrial design rights. Supplier relationship: A supplier client relationship is built on mutual respect, honesty, trust, open and frequent communications, and a shared understanding of each partner's role in helping the supply chain achieve its objectives. With the inception of intellectual property rights era the relationships are becoming more contractual then mutual, keeping everything from designs to the tools and techniques covered under the intellectual property rights. Firms are more interested in having a relationship with the supplier who possesses a good track record in maintaining the level of secrecy whereas the same is also true for the suppliers. The conditions can be ascertained by the facts that most firm don't allow its supplier to enter into their production area. Supplier contract: With the advent of intellectual property rights the contracts are becoming mammoth in sizes, containing sections defining rights over the technology, designs, processes. formulation etc, secrecy clause, intellectual property rights, trademarks, copyrights, jurisdiction in case of disputes, associated penalties and consequences