Audible is running a deal right now where you can get a 30 day free membership which includes 2 audiobooks plus 2 Audible Originals. If you keep your membership, that goes to 1 audiobook and 2 Audible Originals each month going forward.
Audible Originals vary from month to month and include books and plays.
If you have been considering trying Audible, now would be a great time with the extra book for the first month!
