You can read the manga chapters at VIZ Media or purchase the digital version from Barnes & Noble . Tokyo Ghoul [Jack] (Manga) - TV Tropes
Tokyo Ghoul: [Jack] is a prequel spin-off manga by Sui Ishida that follows a young Kishou Arima teaming up with classmate Taishi Fura to hunt a killer known as Lantern. Originally released digitally on the Jump Live app, the series was later adapted into a 2015 Original Video Animation (OVA) by Studio Pierrot. Tokyo Ghoul: "Jack"