No, the narrator just doesn't get the character voices right.
The setting and the characters are great. I could identify with the local area and swear I know some of those folks
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.