In a future where humanity has colonized other planets, a group of humans on the planet of North America are threatened by an alien invasion. The aliens possess advanced technology that allows them to control and manipulate the environment, making it difficult for the humans to defend themselves. A small group of humans, led by a scientist, discovers that the aliens' power source is a massive computer system that can be accessed and controlled remotely. They devise a plan to infiltrate the alien's headquarters and destroy the computer, thereby disabling their technology and giving humanity a chance to fight back. The story follows the group as they navigate the alien's defenses and make their way to the heart of the headquarters, where the computer is located. Along the way, they encounter various obstacles and challenges that test their skills and ingenuity. Ultimately, the humans are able to destroy the computer and disable the aliens' technology, giving humanity a crucial advantage in the war against the invaders.
By H. Beam Piper · First published 1963 · Genre: Science Fiction, Adventure, Space Opera · 22 chapters