The Rage War Series by Tim Lebbon

Predator ships stream into human space in unprecedented numbers. The Colonial Marines, controlled by Weyland-Yutani, respond to the incursion, thus entering the Rage War. This terrifying assault by the Yautja cannot go unchallenged, yet the cost of combat is high. Predators are master combatants, and each encounter yields a high body count. Then when Lt. Johnny Mains and his marines—the VoidLarks—enter the fray, they discover an enemy deadlier than any could imagine... morePredator ships stream into human space in unprecedented numbers. The Colonial Marines, controlled by Weyland-Yutani, respond to the incursion, thus entering the Rage War. This terrifying assault by the Yautja cannot go unchallenged, yet the cost of combat is high. Predators are master combatants, and each encounter yields a high body count. Then when Lt. Johnny Mains and his marines—the VoidLarks—enter the fray, they discover an enemy deadlier than any could imagine. Book one in an epic trilogy that continues in ALIEN: INVASION and concludes in ALIENS VS. PREDATOR: ARMAGEDDON. The universe will forever be changed. less

For centuries Weyland-Yutani has tried to weaponize the aliens. Now someone has beaten them to it, sweeping through Yautja space and turning predator into prey.Faced with the overwhelming forces of the Rage, Earth envoys forge an unprecedented alliance with the Predators. Yet even the combined might of two races may not be enough to stop the carnage, as an unstoppable swarm of Xenomorphs topples planet after planet, penetrating ever deeper into the Human Sphere.

The Rage launch the ultimate assault on the Human Sphere. Their greatest weapons are the most fearsome creatures in the galaxy—the Xenomorphs. Having fled centuries before, the Rage return to take revenge and claim the planet for their own. Now, through a deal struck with the unlikeliest of allies, the human race may rely on the Predators to ensure mankind’s ultimate freedom. Yet even the combined might of the two races may not be enough... moreThe Rage launch the ultimate assault on the Human Sphere. Their greatest weapons are the most fearsome creatures in the galaxy—the Xenomorphs. Having fled centuries before, the Rage return to take revenge and claim the planet for their own. Now, through a deal struck with the unlikeliest of allies, the human race may rely on the Predators to ensure mankind’s ultimate freedom. Yet even the combined might of the two races may not be enough. The fate of the Earth may rest with a single android—Liliya of the Rage. less