I read this manga for my grad school graphic novel class. This is my second manga (this past spring I read Orange). That was basically a teenage soap opera. This one was a sci-fi post-apocalyptic nightmare. The Titans are giant, man-eating, humanoid creatures who have taken over the world. Humans are forced to live in a walled area, for their own protection. In the first chapter, a Titan breaks through the wall and eats people. The drawings are in black & white, but still incredibly graphic. There are close-ups of the Titans biting people in half.
I didn't like this one much. I do enjoy post-apocalyptic stories, but this one was basically devoid of hope. I think this series is quite long, so maybe at one point, something hopeful happens.