OK, but it's been broken for ages. There is a simple python script floating around that you can run on Kindle books to turn them into .html files. The decryption key is just your Kindle's serial number (which I believe is available via USB, so typing it in is not strictly necessary).<p>If you don't have a Kindle, that might be a problem though. But I think Amazon lets you "register" a Kindle, so you can just make up a serial number, buy books, and decrypt them.<p>Basically, the DRM scheme is just a joke to keep publishers happy. If your eyes can see something, it can be copied.