Space Alien War

King Agesilaus and his Terran Legions have won their first victory against the Median Empire. Despite sustaining heavy casualties, they established a vital foothold in enemy territory. Yet the Empire is far from defeated, and they begin to ready their forces for a counterattack. In a display of overwhelming power, they throw fleets of ships and armies of levies and mercenaries against the Terrans. The outcome is uncertain, until Agesilaus and his generals uncover a stunning secret

No one on Earth knows the seeds of the world’s destruction just fell from space. Tiana knows what duty means though. It's why all her friends are dead. Alone on a primitive world. All her all her technology at the bottom of the ocean. Outnumbered by deadly enemies only she can bring to justice. If she fails her mission now, another sentient species will fall. And the Tyrant Empire will rise again - because Earth has just been infected with a fatal parasite.

Humanity, previously dependent on the K'Tai for its Redlazore, discovers vast resources of the most valuable mineral in the galaxy on Agate and is now free to expand across the stars: Redlazore is also the key component to faster-than-light travel. The planet Agate is, however, the human colony-world which lies perilously close to the K'Tai Imperium, and the K'Tai resolve to put the upstart humans back in their place. The K'Tai Imperium invades Agate. On the ground, in the midst of the whirlwind conflict is the Carter family.