Ebooks turn out to be more expensive once the pages have to be printed. Most good books are purchased for souvenir or reference materials for future use. Before the Ebook can be safely stored in a library or bookshelf, it needs to be printed and bound with cover. That process is very inconvenient, especially for working people who want to be more knowledgeable. If not printed, Ebooks can be lost in a busted hard drive or USB. Thus, it will not have any future value.