Halo #2: The Flood

The Human-Covenant War, a desperate struggle for humankind's very survival, has reached its boiling point on the mysterious ring world called Halo. But the fierce Covenant warriors, the mightiest alien military force known, are not the only peril lying in wait. As the fortress world of Reach and its brave defenders were bombarded to rubble, a single cruiser fled the carnage with the battle's only human survivors—Captain Keyes, his crew of a few hundred marines, and the last remaining SPARTAN …