you don't get to know the people in the story until the end. in the end it was just boring.
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.
The story is poorly structured. it gets so boring it's easy to lose interest in it.