New or select returning subscribers. Ends 12/1. Audible is offering three months of Audible, Amazon's online audio book service, for $0.99 per month ($2.97 total). Bonus $20 Audible credit included for a limited time. As a member, you get one free audiobook per month (1 credit) and you can keep them even if you cancel. Premium Plus membership is normally $14.95 per month.