Wolfbane

"Wolfbane" by Frederik Pohl and C. M. Kornbluth is a science fiction novel published in 1959. Earth has been stolen from the Solar System by a rogue planet inhabited by alien machines called Pyramids. The moon now serves as a miniature sun, and humanity has split into passive "Citizens" and rebellious "Wolves." When Glenn Tropile is captured by the aliens and wired into their vast computer system, he discovers the terrifying truth about the Pyramids' purpose and humanity's role in their ancient machine-world.

Wolfbane, by Frederik Pohl. Republished by OpenStories from Project Gutenberg eBook #51845.