https://mobile.audible.
Enjoy 2 FREE months of Audible! You’ll receive 1 free audiobook of your choice each month. Within two weeks after you download your free trial, a $10 electronic Amazon.com gift card code will be emailed to you. Gift card offer only valid for existing Amazon customers.*
** Please note, the links say "Offer Coming Soon", but it is live. I was able to click the last link and sign into my Amazon account to start the trial.