Finally, online shopping can improves ( it is unnecessary if you use singular verb after a modal verb) time to decide to buy books (alternative word = printed material publication). People will also be able to read reviews from previous buyers and select their books with additional information from satisfied customers (you are completely wrong inasmuch as costumers are a people who make and rent out costumes , especially for use in a theatre. soit should be = consumers ) . Also, People can compare prices from hundreds of different sellers. Furthermore, You have the opportunity to compare as many prices as you want without having to spend the time and money for your decision