Two Thousand Miles Below

In Short

A high-stakes adventure of subterranean warfare, this novel follows an engineer and a drifter who discover a hidden, ancient race beneath the American desert. When these "Mole-men" begin an aerial assault on the surface world, the two protagonists are dragged into the depths, forcing them to navigate a dangerous, gravity-defying kingdom to stop the invasion. A classic example of 1930s pulp science fiction, the book endures for its imaginative "hollow earth" setting and its relentless, fast-paced commitment to action, blending geologic wonder with the visceral thrill of a desperate, last-stand war.

The Story

Dean Rawson, an engineer working in the harsh Tonah Basin, is searching for a way to harness geothermal energy when he discovers something far more dangerous: a subterranean race known as the Mole-men. These beings, characterized by their owl-like eyes and copper-skinned bodies, possess terrifying heat-based weapons. After a violent encounter, Rawson is captured and dragged into the depths of the earth, leaving his companion, the mysterious "Smithy," to witness the start of a full-scale invasion of the surface.

While Rawson languishes in a cavernous kingdom of fire and gold, he finds himself caught between two warring subterranean factions: the hostile, expansionist Mole-men and the remnants of a more primitive people led by Gor and the noble Loah. Rawson’s engineering knowledge, combined with his tactical instincts, allows him to navigate this hostile landscape. He discovers that the Mole-men’s power relies on mysterious substances called "Oro" and "Grah," which manipulate gravity and heat.

Meanwhile, on the surface, the military rallies against the invading fleet of underground ships. Smithy, having organized a rescue and strike force, manages to pierce the defenses of the volcanic crater. Inside, Rawson leads a daring revolt. He escapes his imprisonment, reunites with the captured surface soldiers, and helps the local subterranean tribes secure their own freedom while sabotaging the Mole-men’s ability to reach the surface.

The climax arrives as Rawson and Loah—who has chosen to stand by his side despite the mortal peril—orchestrate a final blow against the Mole-men’s leadership. Rawson successfully triggers a massive release of geothermal energy, transforming the crater into a permanent source of power for the surface while sealing off the subterranean tunnels. After the dust settles and the invasion is thwarted, Smithy reveals that he has bought out the mining company, making a wounded but triumphant Rawson a wealthy man. The story ends with Rawson standing by the steaming crater, ready to rebuild his life with Loah, having traded his professional ambition for a hard-won peace.

How It Unfolds

The discovery Dean Rawson, while surveying a volcanic crater for energy potential, realizes that his equipment is being sabotaged. He encounters a group of strange, red-skinned creatures with large eyes who wield terrifying, glowing weapons that turn solid rock into liquid fire.

The descent During a desperate confrontation, the crater floor gives way beneath Rawson, and he plunges into the dark, mountainous bowels of the earth. He wakes up as a prisoner of the Mole-men in a vast, subterranean realm where gravity acts in mysterious, inverted ways.

The alliance Rawson finds common cause with the "People of the Light," a struggling tribe that lives in fear of the Mole-men. He learns the secrets of the "jana"—a buoyant, metallic vessel—and gains the trust of the warrior Loah.

The war While surface-world armies fight an aerial war against the Mole-men, Rawson manages to coordinate a breakout from within the enemy’s council chamber. He frees the captured soldiers and orchestrates a final, decisive strike.

The restoration The volcanic vent is opened, creating a massive column of steam that provides unlimited power for the surface and isolates the subterranean world. Rawson and his allies emerge victorious, ensuring the safety of both worlds.

The People

Dean Rawson is a practical, determined engineer whose analytical mind keeps him alive in an impossible environment. He is a judge of character who sees beyond Smithy's initial appearance of aimlessness, and his transition from a worker seeking energy to a leader of a subterranean revolution defines the book’s emotional arc.

Smithy is the mysterious young drifter saved by Rawson. He proves to be a loyal, high-spirited soldier who possesses a hidden depth of capability, eventually using his own resources to secure the project’s future and rescue his friend.

Loah, a woman of the subterranean tribe, acts as Rawson’s guide and emotional anchor. Her unwavering devotion and bravery in the face of certain death demonstrate the book’s romanticized take on courage; she is a character of action who stands as an equal to Rawson in the final fight.

Phee-e-al is the tyrannical leader of the Mole-men. He represents the cold, repulsive, and expansionist threat, serving as the necessary foil to Rawson’s human warmth. His defeat is the final seal on the protagonists' survival.

In Its Own Voice

"You're pokin' through the crust of hell / And braggin' too damn loud of it, / For, when you get to hell, you'll find / The devil there to pay."

This grim, rhythmic song, sung by the drill workers, sets the foreboding tone for the dangers lurking beneath the desert floor.

"He was a man, and he met the threat of disaster by something better than blind, terrified, animal flight."

This observation about the prehistoric character Gor highlights the central theme of human resilience in the face of overwhelming, unknown forces.

"I've got to hand it to you--you sure do know all the back alleys."

Rawson’s lighthearted remark to Loah underscores his burgeoning affection for her, even while they are on a suicide mission.

What It's Really About

At its heart, the book is a study of human ingenuity and the desire for dominion over nature. The quest for "power"—both physical, in the form of geothermal steam, and political, in the context of global war—drives every action. The narrative poses a question about the ethics of exploration: what happens when humanity’s relentless need for resources forces it to disturb the hidden, ancient corners of the world? It also balances a sense of technological optimism against the terror of "the unknown," suggesting that while science can solve the problems of the surface, it also carries the inherent risk of unleashing forces that are fundamentally hostile to human life.

Why Read It Today

Readers who enjoy the brisk, unapologetic pace of Golden Age science fiction will find this book a rewarding experience. It captures the specific, wide-eyed wonder of a time when the earth’s interior was still a valid setting for alien-like adventure. The prose is functional and direct, focusing almost entirely on the movement of the plot; there is little time for introspection, as the characters are constantly running, fighting, or planning their next escape.

Modern readers should be prepared for the period-typical, one-dimensional portrayal of the "Mole-men" as inhuman, repulsive monsters, reflecting the common tropes of early 20th-century speculative fiction. Additionally, the dialogue occasionally dips into the rugged, hard-boiled vernacular of the 1930s, which can feel stylized or dated. However, for those who value world-building over psychological nuance, the book’s inventive take on gravity, light-energy, and geothermal engineering remains genuinely creative. It leaves you with the image of a vast, hidden world beneath our feet—a reminder of a time when the horizon of scientific discovery felt limitless, and every deep, dark cavern might hold a civilization waiting to be fought or understood.