REACH HAS FALLEN.THE COVENANT WAR MACHINE RAGES ON.HUMANITY'S LAST HOPE LIES WITH THE CREW OF THE PILLAR OF AUTUMN--THE INDOMITABLE CAPTAIN JACOB KEYES, STAFF SERGEANT AVERY JOHNSON, THE AI CORTANA, HUNDREDS OF FEARLESS MARINES . . . AND SPARTAN 117, THE MASTER CHIEF. Having barely escaped the battle for Reach, the crew of the Pillar of Autumn is forced to make a jump into Slipspace in hopes of evading the vast alien alliance hell-bent on wiping out humanity. But their destination brings them to an ancient mystery and an even greater struggle.In this far-flung corner of the universe floats a magnificently massive artificial ring world…a construct from a long lost race. The humans' only hope of survival is to crash-land on its surface and take the battle against the Covenant to the ground.
