"In the United States, e-books are less expensive. Students will say, “I’d like to have the print version, but the electronic version is so much less expensive.

"In the United States, e-books are less expensive. Students will say, “I’d like to have the print version, but the electronic version is so much less expensive.” But if you buy a book used, the publisher and the author are not getting any money but they are getting another reader and they’re not cutting another tree. And the cost is less. And if it goes to a third generation the cost is really less." That's a nice sentiment but there were a bunch of books in college that purposely changed portions from year to year to kill to resale market. Some profs were cool and researched what sections/questions would be so that you could use one of the 3 editions available but others didn't care. I was happy to get all some of my books in digital form in grad school. Preparing for finals was so much easier.