1. When you click on the DOWNLOAD AUDIOBOOK button above, a new tab will open in your browser with the player on the center of the page. 

2. There are 3 vertical dots on the right hand side of the player. 

3. Click on those dots and then click DOWNLOAD

4. Finally, open whatever service you use for audiobooks or audio files (example: iTunes) and click File > Add to Library (or whatever command your audio player uses to import a new file)

5. Select the .mp3 file you just downloaded.

6. Voila! The audiobook is ready for you to take with you wherever you'd like!