Fiction. Non-fiction. Autobiography. Inspirational. Self-help. Different categories are presented for people's interest. Historically, books are very important for studying. Before technology, there were collections of books and a person can have several field of concentration by learning through books. Books are surviving in the rapid advancement of technology. Millennial are in to gadgets rather than books. So, e-book is created for a more convenient way of reading. People are now divided into those who prefer to read hard-bound books and those who prefer e-books. Nothing can really be labeled as better or worse.