Chosen - Lawrence Simpson

This is the third book of the Chosen series. Against all odds, John and his team return to Earth after temporarily defeating the alien enemy, but not without sacrifice. They know they are still in for the fight of their lives. They face a determined and technically advanced foe unrelenting in its efforts to destroy all traces of human civilization. When calamity strikes and all hope is lost, will they hide and flee as some demand, or will John and his group find the will to fight on?

During the struggle, John and his family discover new truth about themselves and the Universe in which they live. If the Earth is to have any hope of existing, each of them knows they must be willing to sacrifice all.

This is a fight for survival.