Kyrathaba Rising

170 years from now, aliens decimate Earth. A relative handful of humans survive, hidden in deep subterranean enclaves that offer some protection from surface radiation. Although the main attack is now seven years in the past, one alien ship remains in orbit, and the conquerors are not content merely to let humanity lick its wounds.

Humanity is greatly diminished, but a few tens of thousands survive, sheltering in huge compounds deep beneath the ground, prepared many years ago against the pos...