When Gutenberg’s movable type setting device first started cranking out pages in the 15th century, there was only one book available; the Bible. Nevertheless, many more people could access information that only a privileged few had access to formerly. Ereaders are creating a new and similar kind of knowledge-access revolution. Ebooks are already out of the early-adopter phase: digital book sales surpass print book sales in January, 2011. However, etextbook offerings for higher education are still limited; limited by number of titles and by features. The link below is a table of current etext publishers, their number of titles, and a comparison of features. As you can imagine, these data points are changing constantly…but normally for the better. That is, as time passes, these publishers add more etext titles and better etext features.