To begin with, Buyers must buy books from the secure site to prevent themselves from being cheated. (2.1.1)The main reason for this is buyers take risk for credit card fraud and, in this case, buyers trust online sites too much and don’t make sure that it is the secure or insecure site. (2.1.2)In addition, buyers also take risk for not getting the books they buy. so they should to make sure that secure.