Will adding DRM-free books to the Kindle store entice Amazon outsiders to start shopping there?

It’s a very frustrating part of the college experience. You pay more than $100 for a textbook, haul it home and then never open it. You turn it in at the end of the semester and get a pittance back.

Juggernaut Amazon is striking another blow at the traditional textbook industry by offering semester-long rentals of physical books. The listings for a number of textbooks now include a "rent" option ...