The Mountain in the Sea — A Novel book cover by Ray Nayler

The Mountain in the Sea

Adult • Mystery • Thriller & Suspense • Technothrillers • Thriller
A Novel
Intelligent octopus species discovered Dr. Ha Nguyen seeks communication Corporate interest threatens existence Android assists in high-stakes research Con Dao Archipelago is the setting

Humankind discovers intelligent life in an octopus species with its own language and culture, and sets off a high-stakes global competition to dominate the future.

The transnational tech corporation DIANIMA has sealed off the remote Con Dao Archipelago, where a species of octopus has been discovered that may have developed its own language and culture. The marine biologist Dr. Ha Nguyen, who has spent her life researching cephalopod intelligence, will do anything for the chance to study them. She travels to the islands to join DIANIMA’s team: a battle-scarred security agent and the world’s first (and possibly last) android.

The octopuses hold the key to unprecedented breakthroughs in extra human intelligence. As Dr. Nguyen struggles to communicate with the newly discovered species, forces larger than DIANIMA close in to seize the octopuses for themselves.

But no one has yet asked the octopuses what they think. Or what they might do about it.

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Edition information

Book details

Publisher
Picador
Publication date
2023
Print length
464 pages
Language
English
ISBN
978-1250872272

Mystery + Thriller & Suspense + Technothrillers

Reader guide

What to Know Before Reading The Mountain in the Sea

A near-future thriller, a meditation on the nature of consciousness, and an eco-logical call to arms, Ray Nayler’s dazzling literary debut The Mountain in the Sea is a mind-blowing dive into the treasure and wreckage of humankind’s legacy.

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About the author

Ray Nayler

Ray Nayler

Hugo and Locus Award winning author Ray Nayler was born in Quebec and raised in California. He lived and worked abroad for two decades in Russia, Central Asia, the Caucasus, and the Balkans. ​Ray's Locus Award winning first novel was The Mountain in the Sea, which was also a finalist for the Nebula, the Arthur C. Clarke, and the Los Angeles Times' Ray Bradbury Awards. Ray's novella The Tusks of Extinction won the 2025 Hugo Award, and was a Nebula and Locus Award finalist. His third book, the cybernetic political thriller Where the Axe is Buried, was published in April of 2025. His next book, Palaces of the Crow, was published on May 19, 2026. ​Ray most recently served as international advisor to the Office of National Marine Sanctuaries at the National Oceanic and Atmospheric Administration, and as visiting scholar at the George Washington University's Institute for International Science and Technology Policy. Ray lives in Washington, DC with his wife Anna, their daughter Lydia, and two rescued cats.
A favorite quote

““No one has yet asked the octopuses what they think.””

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