By 2014, nearly 19% of US Textbook Market will be Digital.Check out the infographic for some other interesting stats.
There was a 400% increase in digital textbook sales between 2008-2009
42% of students either bought or at least seen a digital textbook in 2010. That is a 24% increase from 2007.
Digital textbooks are, on average, 53% cheaper than new print books.