We barely won the battle at Mercury's shipyards, but the war is just beginning. The Telestines, in control of Earth, now pursue us from planet to planet, moon to moon, leaving terrible destruction in their wake. And now, the unthinkable: a new alien weapon with the power to destroy a whole world. Thousands die on Jupiter's moon Io when a bomb detonates, sending apocalyptic storms of debris that threaten millions of people on Ganymede and Callisto...