Books like Attack on Titan, Vol. 31

Eren Yeager , named Eren Jaeger is a fictional character and the protagonist of the manga series Attack on Titan created by Hajime Isayama. Eren is a teenager who swears revenge on enormous humanoid creatures known as Titans, who have forced him and his people to live in walled off cities and devoured his mother while destroying his home town in the Shiganshina district of Wall Maria. In order to defeat the Titans, Eren enlists in the Military and joins the Survey Corps—an elite group of soldiers who fight Titans outside the walls and also study the physiology of Titans in order to know what they are fighting. As the story progresses, Eren gains the power of becoming a Titan later identified as "Attack Titan" . He has also appeared in other related media including anime and video games.