Wall Street Journal article by Alexandra Alter, "Our E-Books Are Reading Us" is worth reading, sharing, and discussing. http://www.artsjournal.com/artsjournal1/2012/06/our_ebooks_are.shtml
As publishers and authors learn more about how readers read, which books they read faster, which lines are highlighted the most by readers... it will change what readers are offered. That is not necessarily a good thing. Think I'll stay offline book-wise and keep my reading choices a little more to myself. On the bright side, it might help text book publishers learn how to better engage students. My suggestion is to reference good books -- such as historical fiction, science fiction, collections of best science articles -- throughout a textbook. Serious students will be enriched. Others might just stumble upon some really great reads.
Here's how Alexander Alter's article starts...
"It takes the average reader just seven hours to read the final book in Suzanne Collins's "Hunger Games" trilogy on the Kobo e-reader—about 57 pages an hour. Nearly 18,000 Kindle readers have highlighted the same line from the second book in the series: "Because sometimes things happen to people and they're not equipped to deal with them." And on Barnes & Noble's Nook, the first thing that most readers do upon finishing the first "Hunger Games" book is to download the next one." more