Got fed up towards the end, not a story I would recommend, after reading Hells Corner, I wanted more of the Camel Club but was a bit disappointed.
There are many reasons why a book might be unavailable.
Sometimes a book goes temporarily out of print - and sometimes no audio version has ever been recorded. Audible wants to give you the most complete selection we can and we'll keep adding series and filling in gaps as quickly as possible.
Read nearly all of David baldaccis books and this is first time Iv used the audio books but didn't disappoint