Hajime Isayama 
According to data released by Oricon , the 11 volumes of the manga have already sold approximately 20.38 million copies. Attack on Titan has become the seventh best-selling manga to reach the 20 million mark, including limited editions. Some of the other series that have achieved this feat are Kimi ni Todoke (with its 18th volume), Naruto, and One Piece. To date, more than 20 million copies of the series have been printed.
Volume 11, released in August, had an initial print run of 1.85 million copies. Approximately 290,893 copies of this edition were sold, and 1,054,915 since its release. All 11 volumes of Attack on Titan have consistently remained in the top 40 best-selling manga rankings on Oricon. Volume 11 is currently in 12th place with 75,525 copies sold. In Brazil, the manga will begin publication in November by Panini . A source told the Mantan Web that Attack on Titan is like a success that only emerges once a decade.