Amazon, which got its start selling books online, announced this year that, for the firs

t time, its digital books had outsold than paper books. This trend of going digital does【M1】______ not hold true for all books: While many popular consumer books have successfully made the switch into the new form,【M2】______ textbooks are already widely read on paper. Textbooks are【M3】______ gaining, consequently, as publishers take advantage of the【M4】______ popularity of tablets like the Kindle and iPad, expanding their catalogues and offering products like rent digital books that【M5】______ expire after a semester or two. The potential for digital growth is leading publishers to experiment products that stretch the boundaries of traditional【M6】______ textbooks, slowly turning away from static text and images toward multimedia, intuitive approach, publishers say.【M7】______ "Textbooks as e-books ought to be seen as a stepping stone of【M8】______ the future," said Mark Majurey of Taylor & Francis, a textbook publisher in Britain. Digital textbooks are any books which can be downloaded【M9】______ to an e-reader or computer or those that can be read online using a Web browser. While no one keeps precise numbers of digital textbook sales globally, a number of companies have seen similar growth patterns and nearly identical market share. According to the Student Monitor, a private student market research company based in New Jersey, about 5 percent of all textbooks required in the autumn in the United States were【M10】______ digital textbooks. That is more than double the 2.1 percent of the spring semester.

【M1】