Darkness has come.

The robotic legions of the First Imperium burst into human space, destroying everything in their path. Their antimatter-powered fleets have drive back the desperately defending human forces, seizing world after world. Directed by the maniacal AI known as the Regent, the enemy have 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 outer systems have fallen, and the heart of human space lies before the seemingly unstoppable invaders.

On three worlds, chokepoints in the network of warp gates that make interstellar travel possible, 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 1,000,000 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)

Jay Allan's Blood on the Stars Series

Book 1: Duel in the Dark
Book 2: Call to Arms
Book 3: Ruins of Empire
Book 4: Echoes of Glory
Book 5: Cauldron of Fire
Book 6: Dauntless
Book 7: The White Fleet
Book 8: Black Dawn
Book 9: Invasion
Book 10: Nightfall
Book 11: The Grand Alliance
Book 12: The Colossus
Book 13: The Others
Book 14: The Last Stand
Book 15: Empire's Ashes (coming)
Book 16: Attack Plan Alpha (coming)

• We started tracking this book on June 24, 2013.
• This book was $4.99 when we started tracking it.
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• The current price of this book is $4.99 last checked one day ago.
• This book is at its lowest price in the past 90 days.
• This lowest price this book has been offered at in the past year is $1.99.
• The lowest price to date was $0.99 last reached on November 13, 2019.
• This book has been $0.99 6 times since we started tracking it.
• The highest price to date was $4.99 last reached on April 7, 2020.
• This book has been $4.99 8 times since we started tracking it.
• This book is currently at its highest price since we started tracking it.

• Science Fiction & FantasyScience FictionGalactic Empire

• Publication Date: June 19, 2013
• Text-to-Speech: Enabled
• Lending: Disabled
• Print Length: 302 Pages
• File Size: 508 KB