The Line Must Hold (Crimson Worlds Book 5)

Darkness has come.

The robotic legions of the First Imperium burst into human space, destroying everything in their path. Their antimatter-powered fleets drove back the desperately defending human forces, seizing world after world. Directed by the maniacal Regent, the enemy pressed forward with one goal €“ the destruction of mankind.

The Superpowers of Earth, bitter enemies for over a century, have at last banded together to face the threat from outside. Their combined forces have fought stubborn delaying actions to buy time, but they haven€t managed to stop the relentless onslaught. Now the Rim has fallen, and the heart of human space lies before the seemingly unstoppable invaders.

On three worlds, mankind will make its stand, and all the power Earth and its colonies can muster has been gathered there. Three worlds €“ Sandoval, Garrison, Samvar. The Line.

Erik Cain grimly leads his veteran Marines and their new allies to Sandoval, to fight and to hold that world against anything the enemy throws at it. But Cain plans more than just a defense; he intends to annihilate the enemy forces€¦and he€ll sacrifice anything to win the ultimate victory. Even his soul.
The Line Must Hold is book five of Jay Allan€s bestselling Crimson Worlds series (over 800,000 sold).

The Crimson Worlds Series (Reading Order)

Book 1: Marines
Book 2: The Cost of Victory
Book 3: A Little Rebellion
Book 4: The First Imperium
Book 5: The Line Must Hold
Book 6: To Hell€s Heart
Book 7: The Shadow Legions
Book 8: Even Legends Die
Book 9: The Fall

Standalone, Can be Read at Any Point:
Red Team Alpha (A Crimson Worlds Adventure)