The Challenge from Beyond by Robert E. Howard is a gripping tale of cosmic horror, written as part of a collaborative effort by five prominent writers of weird fiction. Howard's section stands out for its vivid descriptions, action-packed narrative, and themes of survival in the face of incomprehensible, otherworldly forces.

The story begins when a group of archaeologists uncovers a strange, alien artifact buried deep in the Earth's surface. The artifact, shimmering with an unearthly glow, defies any known scientific explanation. Curious and eager for discovery, the group examines the object, unknowingly setting off a chain of events that will alter the course of human history.

When one of the characters, George Campbell, touches the alien device, his consciousness is suddenly transported across the universe to a distant planet. There, he finds himself trapped in the body of an alien entity—a member of a race far older and more advanced than humanity. Now inhabiting this new and grotesque form, Campbell struggles to comprehend his surroundings, feeling an overwhelming sense of isolation and terror. The alien civilization he has become a part of is ancient and powerful, driven by motivations far beyond his understanding.

As Campbell battles the internal horror of losing his human identity and grappling with the alien mind that now inhabits his body, he must also find a way to survive in this hostile environment. His struggle becomes a desperate quest to regain control over his own destiny, while the fate of Earth itself hangs in the balance.

The Challenge from Beyond showcases Howard's flair for blending science fiction with horror, exploring the fragility of human consciousness in the face of vast, unknowable cosmic forces. It's a story that delves into themes of identity, survival, and the terrifying realization of humanity's insignificance in the grand scheme of the universe.