While the location is modern day Chattanooga there is something about these books that take you back to the very best days of Raymond Chandler.
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.
I haven't yet read the Kindle version. This is a favorite series, so I plan to read all of the series.
Yes, actually I'm relistening right now.