The first decade of the 21st century has ushered in a period of galloping technology with inventions changing so fast that it's difficult to keep up. A good example of this is the ebook ,something unheard-of before the 1990s. an ebook is a book in electronic form. It doesn't have pages you turn like an ordinary book. Instead, it is read on your computer screen or printed out on your printer. Reading your favorite novel online, or even 'leafing through' the pages of a newspaper by simply pressing a button is now reality.