Aria Enson is a thief in the dark city of the Underground. Her friends disappeared 8 years ago and she's been on her own ever since. But what happens when someone from her past reappears?

Love and loss, strength and fear, all come in to play as a looming threat returns to haunt the Scouts. Does humanity have a fighting chance? Or will their angel fall? (Sequel to Underground Rising)

The 60th Expedition outside the walls is set as the Scouts plan to take back Wall Maria. Trust and hope are put to the test in this story of survival and love on the battlefield. (Third part to Underground Rising)