Since the new invention of this modern era, most people are considerably interested to download an e-book on their smart phones and laptops as this kind of books is weigh less and much easier for them to hold by their hands. Storage has become easier, shipping is no more an issue, and these are a sample of many other advantages of e-books. However, it may affect your eye health badly. Through the next lines, this essay will discuss both the merits and demerits.