In the ruined city of Ignis, a wall is not the only thing dividing the people.

Caenogenesis, Book 1 of The Gemini Files by Tasha He, introduces readers to a post-apocalyptic world split between gleaming towers and irradiated slums, where political control, genetic experimentation, and social division shape every life. The novel follows Theopold Kraken, a rebel fighting with the Outsiders, and Yin, a feral and wounded lab-created weapon who has escaped captivity with no memories and a failing body.

Kraken believes in the Outsiders' cause, even as the government calls them terrorists. But when he finds Yin, bleeding and not entirely human, his loyalties are tested in ways he never expected. Yin does not understand mercy, trust, or freedom. She only knows that Kraken is the first person to treat her as someone worth saving.

As Kraken brings Yin into the Outsiders' world, he uncovers a conspiracy that reaches into the highest levels of Ignis. Protecting her may cost him the rebellion, the people he trusts, and everything he has fought for. Walking away, however, is not something he knows how to do.

Winner of the Literary Titan Book Award, Caenogenesis has earned praise for its emotional depth, immersive worldbuilding, and unforgettable central relationship. Literary Titan called the novel "a character-driven sci-fi thriller with a lot on its mind," exploring identity, personhood, rebellion, disability, trauma, and the danger of turning people into symbols. The review praised Yin as the novel's strongest element, describing her journey as "Yin's story of becoming someone, not something."

Editorial reviewers have also celebrated the novel's ambition and impact. Reader's Favorite called it "an ambitious and spectacularly executed novel," while Book Shelfie praised it for hitting "that sweet spot between philosophical sci-fi and dystopian thriller."

Perfect for readers who enjoy Red Rising by Pierce Brown, The Murderbot Diaries by Martha Wells, and Iron Widow by Xiran Jay Zhao, Caenogenesis blends dystopian rebellion, found family, morally complex alliances, and the haunting question of what it means to be human. Fans of Ex Machina will find a powerful and emotionally charged character in Yin, a nonhuman figure learning to define herself beyond the purpose forced upon her.

Readers can get Caenogenesis now on Amazon and Barnes & Noble.

Caenogenesis is the first installment in The Gemini Files, a post-apocalyptic sci-fi dystopian trilogy following Yin Izumi's journey from weapon to person and everything that comes after. Book 2, Metempsychosis, is forthcoming.

About the Author

Tasha He has been writing stories since childhood, when they proudly printed out "chapters" from the family computer to share with relatives. A lifelong lover of science fiction and fantasy, Tasha is drawn to worlds that offer both escape and reflection, especially the deeper truths found within dystopian storytelling.

Beyond writing, Tasha is a passionate disability advocate and the founder of Disenfranchised Writers' Voices, a nonprofit dedicated to supporting low-income and disabled authors. When not building new worlds, Tasha enjoys playing video games and spending time with their beloved pets.

Email: tashahetheauthor@gmail.com

Media Contact

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Tasha He
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