The People In The Trees by Hanya Yanagihara
The novel follows the story of a scientist who, after joining an anthropological expedition to a remote Micronesian island, discovers a lost tribe whose members have extraordinarily long lifespans. His subsequent research into the tribe's secret to longevity leads to worldwide fame but also ignites a complex web of ethical issues, personal downfall, and the dark side of scientific ambition. As the narrative unfolds through the perspective of the scientist's protégé, it explores themes of colonialism, the consequences of scientific discovery, and the blurred lines between progress and exploitation.