Attack on Titan is a person.
is a Japanese manga series written and illustrated by Hajime Isayama . An anime adaptation of the Junior High spin-off manga , produced by Production I.G , began airing in October 2015 . Attack on Titan and all five spin-off manga are published in North America by Kodansha Comics USA , while the three novel series are published by Vertical . As of April 2017 , the manga has 66 million copies in print .