The Dust of Night: The Dust Series, Book 3 (Unabridged‪)‬

After the DZ was destroyed and the Dust mysteriously vanished, the world is eager to forget and rebuild, oblivious to the fact that they remain caught in the middle of an interstellar quest for revenge. Adrian, despite his wavering faith in the Dust Avatar, relentlessly pursues its series of strange and violent directives, all the while haunted by the sound of inhuman cries emanating from the Avatar’s domain. Meanwhile, their hope nearly extinguished, Craig and Lara gain unlikely allies and embark on their last stand against sinister forces in hopes of saving humanity as they know it. 

This is the final book in the Dust trilogy.