the e-books

I think the most important of a language are the books, ebooks are already part of the language, and gradually taking more importance iran member but now the two main problems I see is the price and size of the screen. Ideally, an A4-sized screen to read comfortably and be faithful to the structure of the page with respect to the printed version. Technology currently sacrifice of time other multimedia capabilities that would involve more consumption, less autonomy and possibly a higher price.