Excerpt from: http://stallman.org/articles/ebooks.pdf

•    Amazon requires users to identify themselves to get an ebook.

•    In some countries, including the US, Amazon says the user cannot own the ebook.

•    Amazon requires the user to accept a restrictive license on use of the ebook.

•    The format is secret, and only proprietary user-restricting software can read it at all.

•    An ersatz “lending” is allowed for some books, for a limited time, but only by
specifying by name another user of the same system. No giving or selling.

•    To copy the ebook is impossible due to Digital Restrictions Management in the player.
and prohibited by the license, which is more restrictive than copyright law.

•    Amazon can remotely delete the ebook using a back door. It used this back door in 2009
to delete thousands of copies of George Orwell’s 1984.