Today is the official release date of Warbound. The initial release week is the most important time for a new novel. So if you don't mind, please tell your friends. Spam the internets!
The audiobook is out as well: http://www.audible.com/pd/ref=sr_1_1?asin=B00E3WV9DI&qid=1375798783&sr=1-1
Check out all of the Grim Noir series!! Great story and really compelling characters! I just bought the audible version to listen to with my husband!