This is one of those things where the FSF has the completely correct idea, but has accidentally pointed their finger at the wrong culprit. The problem here is not e-books, it's DRM. The article even says as much at the bottom. I completely agree with the whole point of this article but wish it had used this case as a further tie-in to the various other articles asserting DRM's horrible. I think that the use of the specific case with specific examples to draw into a larger argument is often more effective than continuing to just point the finger at the single instance of the problem.