Clifford Simak

In a future time, the solar system is powered by one energy source, controlled by one huge organisation, which has plans to use this control…

From Astounding Stories of 1932. Earth is being attacked by horrible black monsters that appear from nowhere and destroy and kill everythin…

Clifford Simak deals with the implications of time travel in his own unique way in this story. What if a group of guys did it on their own,…