2. Add the audiobook to your cart.
3. If you are prompted to sign in, please create a new Audible.com account or log in. Otherwise, proceed by clicking “Do you have a promotional code?” beneath the cover artwork of the audiobook.
4. Enter the promo code, and click "Apply Code."
5. A credit for the audiobook will be added to your account. Click the box next to “1 Credit” and click the “Update” button to apply the credit to the purchase.
6. After you select “1 Credit” and click “Update” to modify your shopping cart, the price for the audiobook will change to $0.00. You may proceed through the checkout by clicking “Next Step” and “Complete Purchase” on the subsequent page.