<A target="_blank" href="http://blog.wired.com/business/2009/02/amazons-e-books.html">Proprietary software is part of many systems</A>, but people are objecting to the proprietary nature of the Kindle reader. The problem that started with music - you have to buy a second copy of the album to play it on tape or CD - has now hit the book-reading world. If you buy your Jasper Fforde for Kindle, you can't read it on Sony's reader.