Ray Nayler - The Mountain in the Sea (2022) ENG

When pioneering marine biologist Dr. Ha Nguyen is offered the chance to travel to the remote Con Dao Archipelago to investigate a highly intelligent, dangerous octopus species, she doesn't pause long enough to look at the fine print. DIANIMA- a transnational tech corporation best known for its groundbreaking work in artificial intelligence - has purchased the islands, evacuated their population and sealed the archipelago off from the world so that Nguyen can focus on her research.
But the stakes are high: the octopuses hold the key to unprecedented breakthroughs in extrahuman intelligence and there are vast fortunes to be made by whoever can take advantage of their advancements. And 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. And what they might do about it.