North American publish Dark Horse last released Yasuhiro Nightow’s Blood Blockade Battlefront before the anime adaptation debuted, with February 2015’s volume 7.
Asked on Twitter, Dark Horse explained that they are working with the series’ Japanese publisher (Shueisha) to get the remaining three volumes.
That was released in Japan in June 2013, and the series went another three volumes before relaunching as Blood Blockade Battlefront – Back 2 Back in Jump Sq.