You can upload your own music into the amazon music library, and then play it via the echo: http://www.amazon.com/gp/help/customer/display.html?nodeId=201379280

You can upload your own music into the amazon music library, and then play it via the echo: http://www.amazon.com/gp/help/customer/display.html?nodeId=201379280 http://www.amazon.com/gp/help/customer/display.html?nodeId=2... I assume an audio book could be uploaded as music, but I'm not sure if you can flag it as a book.