The Line Must Hold

In this high-stakes science fiction adventure, Earth’s superpowers unite to confront a formidable enemy threatening mankind’s survival. As the battle lines are drawn across three pivotal worlds—Sandoval, Garrison, and Samvar—Commander Erik Cain leads his Marines and allies in a fierce struggle to defend and eradicate the invaders. With the fate of human space hanging in the balance, Cain is prepared to make ultimate sacrifices to achieve victory.