The main advantage of using e-books, rather than paper books, is because of reducing the number of non-biodegradables. In fact, only one e-book can contain 6,6 tons of paper which are discharged into the environment if the owner gets bored with these books. Therefore, if they are using electronic books, they can delete books instead of throwing them away. The other good point is about its useability and easy transport it where ever you go. Because of its small size and light, people especially girls can put it in a small bag with a fashionable design. Clearly, being convenient and smart is a key advance for the reader.