1. Sign up for Audible.
2. Choose the free trial option.
3. Select your preferred plan.
4. Enter payment details (you won't be charged yet).
5. Start listening to your free audiobook immediately.
6. Enjoy your 30-day trial.
Remember to cancel your Audible free trial before it ends if you don't want to be charged for a subscription. You can do this by going to your account settings on the Audible website or in the app.