This book requires you to have a access code to take the test to get your customized personality profile. However, the audible version does not come with a code. I even messaged them to ask for a code since I thought this must be an obvious mistake. However, they informed me, there is no code in the audible version. So, either way, you have to buy the book twice or pay for the code on your own. A very annoying little tid-bit that should be fixed.