The Amazon Kindle isn't the only e-reader line on the market, but it has been the most popular since it first launched back ...

This update automatically downloads and installs on your Kindle when connected wirelessly; however, you can also manually download the software and transfer the update to your device via USB cable.

Here we chart the history of Amazon's biggest hardware hit ... The most recent budget Kindle is known as the seventh generation (with the Paperwhite referred to as the sixth).