The Gods of Mars

In Short

This novel is a classic work of science fantasy that continues the adventures of John Carter, an Earthman who has become a prince on Mars. Following a long absence, Carter returns to the red planet to find his wife missing, leading him into the forbidden, mysterious Valley Dor. What he uncovers there is a dark, systemic deception that has exploited the religious devotion of the Martian people for generations. It endures as a foundational piece of planetary romance, celebrated for its relentless pacing, vivid world-building, and heroic sense of wonder.

The Story

John Carter, the Virginian who has become a prince of the Martian city-state of Helium, returns to Mars only to find himself in a mysterious, desolate land rather than the palace of his wife, Dejah Thoris. He has been away for ten years, and his arrival is marked by a desperate battle against horrific, man-eating plant creatures. He discovers that he has stumbled into the Valley Dor, a place that Martian tradition identifies as a heaven for those who complete a voluntary life-ending pilgrimage down the River Iss.

Carter soon learns the gruesome truth: the valley is no paradise. Instead, it is a trap where the unsuspecting pilgrims are slaughtered by the "Holy Therns" and the "First Born," two ancient races that maintain their power through religious fraud. Carter manages to navigate the treacherous subterranean world—a "veritable hell" of tunnels and hidden seas—while forming an unlikely alliance with Xodar, a disillusioned member of the ruling First Born, and Thuvia, a captive slave.

His primary mission is to reach the Temple of Issus, where he hopes to find Dejah Thoris, who has been taken captive by the deceitful Therns. The narrative is a series of narrow escapes and high-stakes combat, moving through opulent, lightless chambers and across the surface of the planet in massive, high-tech airships. Carter’s journey is one of systematic destruction of the myths that have terrorized the planet. He consistently disrupts the hierarchy of the First Born, challenging their champions and exposing their cruelties.

The arc reaches a harrowing climax when Carter infiltrates the very heart of the enemy’s stronghold. He finds his wife, Dejah Thoris, imprisoned in a chamber that is destined to remain sealed for an entire year. During a chaotic rescue attempt, he is confronted by Phaidor, the vengeful daughter of the Holy Hekkador, who attempts to murder the Princess. The narrative concludes with a scene of profound ambiguity and tragedy: a struggle in the dark, a dying shriek, and the realization that the chamber has locked, leaving Carter in agony over whether he has saved his wife or witnessed her end. He is forcibly removed from the scene by his allies, leaving his fate—and the identity of the victim of the assassin’s blade—hanging in a state of suspended, agonizing uncertainty.

How It Unfolds

The voyage begins After a twelve-year absence, the protagonist arrives on Mars and is immediately besieged by grotesque monsters. He unexpectedly reunites with his old ally Tars Tarkas, the mighty green Martian, and they resolve to fight for survival in a hostile wilderness.

The discovery of the lie The two warriors realize that the legendary "Heaven" of Mars is actually a slaughterhouse built on ancient, cruel traditions. Carter learns that the religious leaders have been tricking millions into a voluntary death for their own base gain.

The descent into the underworld Carter infiltrates the subterranean realms of the First Born, a hidden civilization beneath the planet’s crust. He navigates complex corridors and dark seas, battling the elite warriors of this secret empire while seeking his missing wife.

The siege of the temple The climax involves a massive, desperate infiltration of the Temple of Issus. Carter leads a rebellion of prisoners, turning the ritualized ceremonies into a battlefield to shatter the power of the ruling classes once and for all.

The final confrontation The narrative concludes with an emotional and violent encounter inside a sealed prison cell. A rival’s jealousy leads to a tragic act of violence, leaving the protagonist—and the reader—uncertain of the outcome as the story ends in a moment of unresolved grief.

The People

John Carter is the central figure, a man of immense physical strength and unwavering, chivalrous resolve. He is driven by a singular devotion to his wife, Dejah Thoris, which leads him to challenge the religious and political pillars of an entire world. While he is a masterful combatant, he is also defined by his mercy, often sparing enemies who expect only death.

Tars Tarkas, the green Martian Jeddak, serves as Carter’s stalwart companion. His journey is one of emotional awakening; once a creature of pure logic and war, he has learned the capacity for love and friendship. He remains a steadfast ally, providing both tactical wisdom and a moral anchor in the madness of the underworld.

Thuvia, a captive slave, possesses a unique knowledge of the subterranean horrors and becomes a vital guide. Her unwavering loyalty to Carter highlights his role as a liberator. Phaidor, the daughter of the Holy Hekkador, acts as the narrative’s dark mirror. Her obsessive, possessive love for Carter and her capacity for cold-blooded jealousy stand in sharp contrast to the genuine, mutual devotion shared by Carter and Dejah Thoris.

In Its Own Voice

"This, John Carter, is Heaven."

This bitter, ironic declaration from Tars Tarkas reveals the horrifying reality of the "paradise" to which the pilgrims of Mars have been flocking for centuries.

"The Holy Therns eat human flesh; but only that which has died beneath the sucking lips of a plant man--flesh from which the defiling blood of life has been drawn."

Thuvia explains the gruesome nature of the religious rites that have kept the ruling class of the Valley Dor fed and powerful.

"I am a citizen of two worlds; Captain John Carter of Virginia, Prince of the House of Tardos Mors, Jeddak of Helium."

Carter asserts his dual identity when challenging the warriors of the First Born, signaling his role as a bridge between his earthly roots and his Martian responsibilities.

What It's Really About

At its core, the book is a critique of the corrupting influence of unchecked religious authority and the dangers of blind, inherited tradition. By depicting a world where the afterlife is revealed to be a literal cage maintained by an elite, parasitic class, the narrative argues that enlightenment is a process of tearing down false idols. It explores the tension between civilization and savagery, questioning whether the "noble" traditions of a society are merely tools for the powerful to exploit the weak. Ultimately, it is an argument for personal agency and the necessity of confronting uncomfortable truths, even when those truths shatter the foundations of one's entire culture.

Why Read It Today

This book is essential for readers who enjoy high-octane adventure and the "planetary romance" subgenre, where the world itself is a character. It offers a sense of wonder that is rarely matched in contemporary fiction, characterized by vivid, exotic landscapes and a hero who acts with absolute, unwavering conviction. Those who appreciate the roots of modern space opera will find the origins of many classic tropes here.

However, a modern reader should be prepared for the book's period-specific attitudes and the stylistic conventions of early 20th-century pulp fiction. The prose is earnest and direct, sometimes leaning into melodramatic descriptions of honor and combat. The pacing is relentless, focusing more on action and movement than on internal psychological depth. Some of the social hierarchies and attitudes toward race and gender reflect the era in which the book was written, which may strike a contemporary audience as antiquated or problematic. If you can embrace the book as a relic of a different time—a bold, imaginative journey that paved the way for science fiction as we know it—it remains a deeply engaging read. What stays with the reader most is not the individual skirmishes, but the crushing weight of the suspense at the end and the image of a hero standing against the entire machinery of a dying world.