Audible – Use 3 credits by Sep 30, Get $10

Use 3 credits between September 27 and September 30, and get $10.
https://www.audible.com/mt/XCSept17
Tips:
-Add the 3 books to your cart, then check out instead of doing it one by one.
-From the last time they did promo, plenty of people including myself did not get the $10 credit by the date stated in the fine print. However a few minutes in chat with Audible can quickly resolve it as they will issue you the $10 manually.
Fine Print:
You must use 3 or more credits between September 27, 2017 and September 30, 2017 @ 11:59 PM PT (US) to be eligible for the $10 coupon (USD). The promotion applies only to items sold by audible.com. The same items sold by other sellers (e.g., audible.co.uk) do not qualify. Coupons cannot be resold, transferred for value, redeemed for cash or applied to any other Audible account, except where required by law. This promotion may not be combined with other offers. An Audible account is required to be eligible for this promotion. Limit one reward per customer. Your coupon for $10 USD will be dropped into your account no later than October 7, 2017. The coupon will expire on November 4, 2017. Other terms and conditions apply, including those available here. If you violate any of the terms or conditions, the promotion will be invalid, and the offer will not apply. Audible reserves the right to modify or cancel at any time. Void where prohibited.