No.6, book 5
Atsuko Asano et Hinoki Kino2014

“THE MANHUNT IS HERE!”

The rumors were true! Armored vehicles from No. 6 roar through the gate into West Block, massacring the helpless and arresting everyone else. Amid the chaos, Shion and Rat realize this could be their only chance to get into the Correctional Facility and save Safu. But when they do make it inside, what they find is worse than anyone could have imagined...