DO OR DIE Some wars are fought for land. Some for power. This one is fought for survival itself. When half the world's population dies in a single hour - no warning, no mercy, no explanation - Supreme Commander Dhruv Khatri becomes the last line between humanity and total extinction. Operating from Sky Fortress - the most powerful vessel ever built - he commands the last organized military force on earth. No home base. No allies. No rules. Only one mission. Find who did this. And destroy them completely. But the enemy that killed four billion people in sixty minutes isn't finished. And the most classified secret aboard Sky Fortress - a machine that should not exist - may be the only weapon capable of ending a war that spans not just the world. But time itself. Dark. Brutal. Ruthless. This is Do Or Die.