Attack on Titan 2Attack on Titan is a breakout hit in Japan, where is has sold over five million copies in just one year. This title has breakout potential in the U. S. as well. 16 and up. BIRTH OF A MONSTER The Colossal Titan has breached humanity's first line of defense, Wall Maria. Mikasa, the 104th Training Corps' ace and Eren's best friend, may be the only one capable of defeating them, but beneath her calm exterior lurks a dark past. When all looks lost, a new