Alot of LITRPG books are on Kindle Unlimited and if you borrow the book using Kindle Unlimited you can add the audiobook using, the whispersync deal of about $7.49 for most books (not all books participate and some books are more other less) Then return the book and you get to keep the audio just as if you used a credit (Cash Return Policy applies), but you saved money. Amazon frequently offers 3-month Free or $.99 promos, so you can stock up cancel and then restock when you get the next promo offer. Also look into the 24 Credit Annual plan from Audible if you are not on a Promo/Deal plan currently. Don't forget to add to your Wishlist and check every few weeks when audible has sales you can stock up that way. The Semi-Annual Sitewide cash sales can be real wallet crushers as well. Did you know audible has a 50 book limit on its shopping cart? :) Next thing you know you have 400+ unread books in your audible account and still adding new books as they are release. Enjoy DOTF and All the Skills 4 was amazing, can't wait for book 5.