Tokyo Ghoul

Tokyo Ghoul (東京喰種トーキョーグール, Tōkyō Gūru) is a horror manga series written and illustrated by Sui Ishida. It was published by Shueisha and collected into 14 tankōbon volumes as of August 2014. It was serialized in the Weekly Young Jump from September 2011 to 2014. On October 17, 2014, a full color illustration book known as Tokyo Ghoul Zakki was released along with the 14th and final volume of the manga.

A sequel titled Tokyo Ghoul:re (東京喰種トーキョーグール:re, Tōkyō Gūru:re) began serialization in 2014's 46th issue of Weekly Young Jump, published on October 16, 2014 and has thus far reached its thirteenth volume. As of October 2017, both series combined reached over 32 million copies in circulation.

An anime adaptation produced by Studio Pierrot premiered on Tokyo MX on July 3, 2014. Funimation licensed the anime for streaming and home video distribution in North America on June 6, 2014. Its third season is set to air in 2018. Four light novels have been released thus far and all are written by Shin Towada, with illustrations done by series creator Sui Ishida. Along with two official stage plays, part one in 2015 and the other in 2017, a live-action film based on the manga was announced in June 2016 that was released July 29, 2017 with a sequel in the works.

A video game titled Tokyo Ghoul: Carnaval by Bandai Namco Games was released in Japan on February 6, 2015. Followed by another video game titled Tokyo Ghoul: Jail for the PlayStation Vita console, released on October 1, 2015. The second mobile game, Tokyo Ghoul:re INVOKE, launched March 13th of 2017, another game from Bandai Namco. Finally, set to launch is Tokyo Ghoul: Dark War, developed by GameSamba for Android and iOS devices.

Plot
Strange murders are happening in Tokyo. Due to liquid evidence at the scene, the police conclude the attacks are the results of 'eater' type ghouls. College buddies Kaneki and Hide come up with the idea that ghouls are imitating humans so that's why they haven't ever seen one. Little did they know that their theory may very well become reality.

Official

 * Toykyo Ghoul (Young Jump)
 * Tokyo Ghoul:re (Young Jump)

Other Sources

 * Wikipedia
 * Mangaupdate
 * MyAnimeList
 * MyAnimeList