Enduring . Dangerous. Love.
I loved the story between Braith and Aria. His need to have her, her loneliness without him, their reunion.
I haven't read the print version but apparently I will have to with book 4.
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.