Attack On Titan, Vol 20 by Hajime Isayama

What’s left of mankind has hidden in a giant, three-walled city, trapped in fear of these bizarre, giant humanoids known as the Titans. Little is known about where they came from or why they are bent on consuming humankind, but the sudden appearance of an enormous Titan is about to change everything…

The Survey Corps’s quest for the truth of the world inside the Walls has brought them back to Titan-infested Shiganshina District, a mere stone’s throw from Eren’s childhood home. They have come to execute Erwin’s final gambit, reclaiming Wall Maria and the secrets of humanity’s past. But the Colossus Titan, the Armored Titan, and the Beast Titan have been waiting for them, and saving humanity will require the most difficult sacrifice the Corps has ever had to make…