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In Short

This science fiction story follows Jonathan Morgan, an Earthling who develops "infinite" powers after an experimental accident with a rare element called calcatryte. Summoned by alien intelligences across the cosmos, Jonathan travels to the planet Neeoorna to combat "black flames"—a strange phenomenon that is consuming the universe. He must navigate a dangerous rivalry with a Zarathzan scientist and master his own evolution to stop the cosmic decay. The book remains a quintessential artifact of its era, capturing the boundless imagination and pulp-adventure energy of the mid-1940s.

The Story

Jonathan Morgan’s life changes in a single, terrifying moment in a laboratory when his concentration causes a lead block to disintegrate and his own body to feel "infinite." His mentor, Dr. Wooden, recognizes that Jonathan has tapped into a latent potential—the ultimate goal of human evolution. Soon, Jonathan is beckoned by a distant, peremptory call. He abandons his Earthly life, expanding his physical form into a cloud of shimmering motes and propelling himself through the voids of space.

He arrives on the planet Neeoorna, a hub for diverse alien species including the reptilian Shar Bytu and the human-like Adatha Za. They are all desperate; a terrifying, alien force known as the "black flames" is devouring moons and threatening to erase the universe. These flames are impervious to all conventional weapons, and previous champions have vanished upon confronting them.

A tense social and political atmosphere permeates the embassy. Jonathan clashes with Morka Kar, a haughty Zarathzan scientist who views the Earthling as a primitive barbarian. Their rivalry culminates in a "mental monomachy," an arena battle where the two combatants use manifestations of thought to strike at one another. While Morka Kar conjures complex, lethal weaponry, Jonathan finds victory by relying on a simple, "primitive" Earth sport: baseball. By manifesting a bat and hitting a "fastball," he outsmarts his opponent's over-complicated tactics.

This victory earns Jonathan the right to confront the black flames. He realizes that the flames are merely emanations from the calcatryte rays he helped discover, which have traveled into higher dimensions where three-dimensional weapons cannot reach them. By entering the flames and using his understanding of "straight" versus "curved" physics—and his ability to navigate hyperspace—he dissolves the threat at its source.

Returning to the laboratory on Earth, Jonathan shares his journey with Dr. Wooden. He explains that his powers are the result of human adaptability pushed to its absolute limit. With the immediate danger to the universe extinguished, Jonathan prepares to depart Earth once more. He has no desire to remain in his old life; instead, he chooses to return to the stars, specifically aiming to reach the planet Zarathza to reunite with Adatha Za and witness the sunrise over the Jaralayan Sea.

How It Unfolds

The accident occurs Jonathan accidentally manipulates matter in his lab, turning lead into dust and expanding his own physical form. He realizes he has unlocked a latent, infinite power that transcends the laws of physics.

The call to adventure Driven by an external summons, Jonathan leaves his life on Earth behind. He travels through the star trails, eventually arriving at the amber world of Neeoorna to meet a council of extraterrestrial species.

The looming threat The council reveals the existence of the black flames, a mysterious menace that devours stars and planets. Jonathan discovers that he is the only one who might possess the unique perspective to stop the encroaching destruction.

The mental duel Tensions rise between Jonathan and the arrogant Morka Kar, leading to a trial of strength in the arena. Jonathan relies on an unexpected, Earth-bound strategy to defeat the Zarathzan’s complex mental weaponry.

The resolution Jonathan confronts the black flames, realizing they are a byproduct of his own scientific experiments acting through hyperspace. He successfully dissipates the anomaly and chooses a life among the stars over his former existence.

The People

Jonathan Morgan is a man of humble origins who finds himself thrust into a role of cosmic significance. His defining trait is his "infinite" adaptability, a quality that allows him to solve problems that baffle more advanced, rigid alien minds. He is grounded, occasionally crude, and fiercely protective of his autonomy.

Dr. Wooden is Jonathan’s mentor, a dedicated physicist who represents the scientific aspirations of Earth. He serves as the intellectual sounding board for Jonathan’s discoveries, remaining a loyal friend even as his assistant transcends the limits of humanity.

Adatha Za is a Zarathzan scientist who becomes Jonathan’s companion. She is intelligent, compassionate, and trapped by the restrictive taboos of her own culture. Her relationship with Jonathan provides the emotional anchor for his journey, representing the life he eventually chooses to pursue.

Morka Kar is the primary antagonist, a brilliant but fanatical Zarathzan. His deep-seated elitism and hatred for "barbarians" lead him to view Jonathan as a threat to his own status. His eventual defeat in the arena serves as a necessary humbling that highlights the inadequacy of his purely academic, rigid worldview.

In Its Own Voice

"I'm mad," he said to himself, knowing he was utterly sane; that was what frightened, knowing his sanity.

(Jonathan experiences the first shock of his transformation, fearing that his perception of reality is breaking down.)

The glass in his hands stretched noticeably; grew and expanded to pint size, to the size of a quart container.

(Jonathan demonstrates his newfound ability to manipulate the physical properties of matter before the eyes of his mentor.)

He hurtled onward, toward the ebony maw that shook and glistened and bellied against the dark of space like a translucent blob of jelly.

(Jonathan approaches the final confrontation with the cosmic threat, putting his own life on the line to save the universe.)

What It's Really About

At its core, the story explores the concept of evolution as an ongoing, inexorable force. The narrative suggests that humanity’s greatest strength is not its technology, but its inherent, messy capacity to adapt to any environment. By framing the protagonist's "infinite" powers as the result of millions of unused brain cells finally being harnessed, the book argues that human potential is currently untapped and vast. It posits that the "primitive" nature of Earthlings is actually an advantage, as it keeps them flexible, emotional, and capable of thinking outside the rigid, highly specialized frameworks of more advanced alien civilizations. Ultimately, it is a fable about the necessity of embracing the unknown to achieve a higher state of being.

Why Read It Today

Readers who enjoy the classic "Golden Age" of science fiction will find much to admire here. It possesses the distinct, breathless pacing of 1940s pulp magazines, where grand cosmic concepts are introduced with a sense of wonder and urgency. The prose is direct and energetic, focusing on the immediate action and the intellectual leaps that define the genre's best work.

However, a modern reader should be prepared for the period-specific attitudes and the occasional "gee-whiz" tone. The dialogue can feel dated, and the casual, sometimes abrupt resolution of high-stakes conflicts reflects the storytelling conventions of its time rather than the character-driven nuances of contemporary fiction. There is a certain lack of depth in the world-building, as the narrative prefers to move swiftly from one spectacle to the next.

Despite these artifacts, the book remains a memorable read for its sheer, unbridled optimism about the future of humanity. The image of a man taking a baseball bat to a cosmic threat is delightfully absurd and perfectly encapsulates the book’s spirit: a belief that no matter how complex or terrifying the universe becomes, a little bit of human ingenuity—and a bit of grit—might just be the key to saving it all.