Attack on Titan Colossal Edition 1

Humankind is down to just a few thousand people who live in a city surrounded by three concentric walls. The walls protect them from their enemies, the ravenous giants known as the Titans. The Titans appear to have only one purpose: to consume humanity. For one hundred years, what's left of mankind has lived in the city on earth, protected by walls that tower over even the Titans. Untouched by the Titans for a century, humanity has become complacent. But Eren Jaeger has had enough. While his fellow citizens are content to hide, Jaeger has the passion to take action to not only protect the city, but to learn what the Titans actually are. On his first mission he comes face to face with horrors beyond his imagination... and secrets from his own past that could shift the tides of war. Attack on Titan: Colossal Edition is an oversized collection of the first five volumes of the Attack on Titan manga series. Weighing in at a massive 960 pages and a 7-inch by 10.5-inch trim, the Colossal Edition contains the same material as the original volumes, but bigger and on higher-quality paper.

Source: Anime News Network Encyclopedia