Shingeki no Kyojin (進撃の巨人) or Attack on Titan series is Isayama Hajime (諫山 創)'s masterpiece. The story is about a battle between humans and titans. The series has been extremely popular in Japan and around the world.
【NEWS】— 別冊少年マガジン【公式】 (@BETSUMAGAnews) September 1, 2016
Recently, Bessatsu Shounen Magazine (別冊少年マガジン) has announced the good news on Twitter that "Attack on Titan has already sold over 60 million copies". It's a highly successful work in the manga industry in the current range.
Previously, Attack on Titan manga has reached 52 million copies sold in October 2015. That means it can be sold more than 8 million copies in just 10 months!!!