Buried beneath the Earth lies a secret older than civilization—and more dangerous than anyone imagined.

In Terror Out of the Past, science fiction pioneer Raymond Z. Gallun spins a thrilling tale of discovery, danger, and forgotten power. When explorer Perry Wilcox and scientist Dr. Roderick Murgatroyd unearth the ruins of an ancient, hidden civilization deep below a remote knoll, they awaken more than just dormant machines. Within the subterranean fortress lie powerful automatons, strange technologies, and the story of a civilization lost to time—and ambition.

But as the two men dig deeper into this underground world, they're caught in a web of betrayal, miniaturization, and mechanized warfare. A corrupt businessman seeks to exploit the ruins for profit, unleashing chaos that draws in modern military might against ancient power. The survival of both the explorers and humanity itself may depend on unraveling the secrets of the past before it's too late.

Narrated by Ram Ranjini with thrilling clarity and emotional weight, this pulp-era gem is a high-stakes fusion of classic sci-fi adventure, mystery, and cautionary tale.