Hajime Isayama’ s Attack on Titan is a manga that meets great success. In October 2015, the manga has surpassed the 52 million copies in print worldwide, and this year, it has reached 60 million copies in print. The news came from the official Twitter account of Kodansha’ s Bessatsu Shonen magazine, where it is being published. However, the announcement does not specify whether the number of copies in printed is on world level or just for Japan.

The manga has inspired a television 25-episode anime series, which was released in 2013, and in spring 2017 will return with the second season. Also, two films, several novel series, one spin-off live-action television series, an OVA and several video games was based on its story. Moreover, two spin-off manga, Attack on Titan: No Regrets and Attack on Titan: Junior High received anime adaptations.

Source: animenewsnetwork.com