Another "3 books for 2 credits" Audible sale (effectively 33% off). Lots of books categorised by genre.
Note: You need to be logged into your account for the link to the sale to work.
These are the US-store titles, Australian store titles may vary.
Mysteries and Thrillers
Science Fiction
Fantasy
Teen
Romance
If you don't already have an Audible account you can sign up by clicking here and you'll get your first month with 2 free audible books. Cancel within the 1st month and pay nothing.
Referral code is from the TWIT podcast (I have no affiliation), it's one of the few referral codes that gives 2 free books instead of 1.
You can then use those 2 free credits to get 3 books - for free!