The House That Stood Still

A thrilling tale of a struggle to save Earth from Armageddon, written by one of the crucial authors of the Golden Age of Science Fiction. Disaster is quickly approaching and the only ones who know of it are Allison Stephens and a group of ancient sinister aliens. Now the aliens plan to abandon Earth and seek a new home. Also published as "The Mating Cry" and "The Undercover Aliens"