Amazon faces criticism for deleting e-books
http://scitech.blogs.cnn.com/Amazon deleted books that were already available in print, but in our paperless future—when all books exist as files on servers—courts would have the power to make works vanish completely.
[Harvard law professor Jonathan Zittrain] writes: “Imagine a world in which all copies of once-censored books like Candide, The Call of the Wild, and Ulysses had been permanently destroyed at the time of the censoring and could not be studied or enjoyed after subsequent decision-makers lifted the ban.”