Here are five free download codes for Endlessly and How to Kill Yourself by C.V Hunt. I believe that the first set of five are for Endlessly and the second set are for How To Kill Yourself. 
1.Y7D4LBHDE3TC6    2.3CZQBUZYJDHFQ    3.7M9AHKAZX49YF    4.RNSULK25SUGPL    5.JLBSBB8J9NRC9    
1.UQSBW9DFDTNWJ    2.RXP3X6F3KHUCF    3.QGJFJFTBX3ANP    4.XDYU3CZL8A37H    5.3HLXGR5C3NPSS    

1.    Visit http://www.audible.com/at/redeem 
2.    Enter the download code into the "Redeem Your Promotional Code" field and click "Redeem". 
3.    If you’re not an Audible customer you’ll need to create a new Audible.com account. Don’t worry, you can use your Amazon account to do this.
4.    Follow the instructions. You’ll have 1 credit applied to your account.
5.    Go to my book’s listing:
Endlessly - http://www.audible.com/pd/ref=sr_1_1?...
How To Kill Yourself - http://www.audible.com/pd/ref=sr_1_2?...
6.    Add it to your cart. When you check out you’ll see an option to apply the free credit.