Orphaned Worlds

Cobley, Michael. Orphaned Worlds. Book 2 of the Humanity's Fire series. 2010. 480p. ISBN 9781841496337. 

The deployment of Brolturan troops on Darien in Seeds of Earth was followed by a stiffening resistance as the humans on the planet sought to defend their home against a ruthless invader. Greg Cameron finds himself the unlikely leader of the resistance defending against mech attacks and assaults from Brotulran troops. A Knight of the Legion of Avatars, an ancient sentient race that long ago merged with machines to transcend the bounds of flesh, reaches Darian and diverts control of a Sendrukan mech factory for its own nefarious purposes. Ambassador Robert Horst, who traveled through hyperspace to meet with the Construct and then on to request the Godhead's help, seeks to transport the Zyradin, an ancient ally of the Forerunners, back to Darien to shore up the defenses of the forest entity that protects the planet and its moon.

When religious fanatics destroy the Brotulran's flagship and land troops on Darien and its moon, the human warship is forced to withdraw. Meanwhile, a group of humans known as the Enhanced have been captured by another human, who serves the Spiral but has devious plans of her own in place. As AI takes control of the Brolturan positions and battle strategy, the Sendrukan ambassador is isolated in a shifting political situation. With forces gathering on Darien, the Legion's ancient evil seeks to escape from its prison deep in hyperspace. Will Catriona's transformation into Guardian thanks to the Zyradin help shift the balance of power?