Journal of Information Organization Oh Se Beom, Chungkon Shi 3 1 2013 http://www.dline.info/jio/fulltext/v3n1/1.pdf The key question of this paper is what will come as the next e-book after the present ebook, which is merely a digitalized version of the paper book? This paper extracts three elements of book, and categorizes three generations of books by news analyzing. This paper suggests a new e-book model that can be realized with the advance of media technology, from the viewpoint of three elements of books. In particular, the Multi-Device e-Book prototype was made and simulated. This simulation suggests novel reading experience the new e-book will bring.