You can redeem an audiobook credit in the following way:
1. From the 'For You' screen tap on 'Explore'.
2. Tap on the search bar.
3. Select Audiobooks.
4. Type in the title, author or topic you would like to search for.
5. After selecting the title you would like, click on 'Use 1 Audiobook Credit'.
6. Click 'Confirm'.