I just went to Amazon and checked the sales status of Lessig's new book. It was in the 400s this morning but was 58 when I checked at 5pm on the 25th of March. At his website you can download the entire book for free and he still made it to 58 on Amazon. You are moving books if you are in the top hundred at Amazon. Just goes to show that currently electronic copies do not stand up to the printed work. People still want that paper.
Link to book at Amazon.
Link to Lessig's website