. . . . . . . "Among the exhibitors at BookExpo were Sideways, which helps authors and publishers transform text into multimedia content, adding video, pictures and features such as Twitter feeds, Ripple, which allows adults to buy children???s e-books and record their voices reading them, and gadgets like the enTourage eDGe ??? a twin-screened device which opens like a book to reveal an eReader on one side and" .