Books like Gantz/26

The shape-shifting 100-point alien boss has finally been destroyed—along with much of Osaka—and Kei Kurono is back on the team, resurrected after his second death. But good times never last as the Gantz orb reveals a countdown clock showing that Earth has just over a week before catastrophe strikes, and the Tokyo team is whisked to Italy to face a new set of deadly foes on what what may be their final mission!