When two Americans step into the "shadow world" of the fourth dimension, they expect danger, but they don't expect what they find: an advanced civilization on the brink of collapse, a stolen life-force called abcilene, and a growing fear of an enemy across the border. Tom Jarvis and Peter Hantzen have one mission — return to Earth with the rare substance they call radiumite, a resource that could stop a global war before it starts. But every world has its own politics, and every mission has its traitor. Someone isn't who they seem, and the thefts happening in this strange dimension may already have deadly consequences.
Written by Ray Cummings, one of the most important early voices in science fiction, "Shadow World" blends scientific speculation, alien culture-building, and thriller pacing. Cummings helped shape the genre in the 1920s and '30s with stories that explored parallel universes, time travel, and dimensional physics long before they became mainstream sci-fi themes. His famous quote still echoes today: "Time is what keeps everything from happening at once." A defining author of the early pulps, he worked for Thomas Edison, wrote for Argosy and Amazing Stories, and inspired generations of writers who built on his cosmic imagination.
This is vintage, high-concept science fiction at its best — a world of thought-communication, shimmering life-energy, and heroes forced to choose between loyalty, survival, and the fate of two universes. What begins as a scientific mission becomes a moral crisis, a battle of ideologies, and a race against both war and betrayal.
