If Earth falls humanity is doomed.
A rescue mission must be mounted to save the human race. The Social Organizational Governance refuses to see the threat, believing themselves safe behind waves of warships and missile platforms but the enemy is already on Earth and it is growing in strength.
If Earth falls humanity is doomed. In order to save the human race, Mathison and his Marines must penetrate the most heavily fortified solar system in the history of the galaxy.
This is the final book of the series.