You can listen on your smartphone! Just look for the Ramsey Audiobooks app in the Apple app store or Google Play store. Once you have the app downloaded, log in and add your new book to your library. You can then stream the audiobook or download to listen offline.
To download the book, click on the audiobook you'd like to download - this will take you to an Overview page with a brief description of the book. To the right of the Overview title, there is a download icon - click on this button to download your audiobook. Once the button turns green, your audiobook is now downloaded. You can then click on Start Book (or Resume Book if you've already started the book) to continue listening offline.