Epub v5Beneath the Earth's shattered crust...does the Black Army still wait? After a thousand years of defeat...is the Black Army still fit? Inside their lost underground stronghold...is the Black Army drilling? Archeologists considered the legend superstition and poked about among the surface ruins. Tourists regarded the tales as tourism ads to glamorize a burned-out world. Robots believed only what they saw and none had ever seen such an army. But when a combination of all three tripped the alarm by accident, they found reality turned suddenly into nightmare...as the Black Army awoke to march against the universe!

EPUB v4

Epub v5Robotic minds made interstellar travel possible, but human minds still controlled the destination and purpose of such flight. Conflict develops only when a programmed brain cannot evaluate beyond what is visible and substantial, whereas the human mind is capable of infinite imagination - including that which is unreal. Such was the problem at the singularity in space in which the ALTAIR STAR and a hundred other vessels had come to grief. At that spot, natural laws seem subverted - and some other universe's rules impinged. For Buchanan, the station meant a chance to observe and maybe rescue his lost vessel. For the robotic navigators of oncoming spaceships, the meaning was different. And at Singularity Station the only inevitable was conflict.