Paper books or e-books? As we all know, books, as the traditional container to store knowledge, already have been replaced by the internet. From my perspective, the pros outweigh the cons. There is no doubt that, when we are studying, paper books must be a better choice for us. It is much more convenient for us to take notes while reading. Besides, compared to read e-books, it is more comfortable for our eyes to read paper books. If we continue reading on electronic devices for hours, it will do harm to our eyes and creates the need for stronger glasses. To sum up, paper books are good at both taking notes and our eyes health. However, in most cases, paper books are too heavy to take out. By contrast, no matter how many books we have to read, what we only have to carry is an electronic device, such as a mobile phone, a tablet, and so forth. It is a much more portable and convenient way for us. Also, storing knowledge in the internet reduces the demand for paper whose raw material is wood. In the long run, fewer forests will be cut down to make papers. Therefore, it is an environmentally friendly choice. Besides, recently, more and more intelligence electronic books have been produced. As the rapid development of science and technology, some advanced devices have been equipped with a function of taking notes while reading. Advanced technology improves our reading experience of e-books. Taking notes conveniently won't be the exclusive advantage of paper books any more. In other words, compared to paper books, e-books are much more portable and environmentally friendly. And technology can make up its disadvantage on taking notes. To sum up, I admit that paper book is better at both taking notes and our eyes health, however, I believe that the future lies in e-books.