To remove a saved audiobook, navigate to the “My Books” section. On the top right you will see a link that reads “Manage.” Tap “Manage” to find a collection of your saved and downloaded audiobooks. Find the book you would like to remove and navigate to the menu by pressing on the three dots on the upper left corner of the cover. Tap “Finish and Remove Book” and the audiobook will no longer be saved.
You can also remove a book when you have it open in your app. Press on “x saved” which you can find below the cover. Press “finish” and the audiobook will be removed from your saved books.