I loved the story, the narrator was excellent. everything abt this book was excellent
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.
For me, the connection to the characters and the way the narrator manages to allow us to feel as if each individual is speaking.