The book explores the dramatic impact of human intervention on the ecosystems of Lake Victoria, focusing particularly on the cichlid fish species. The author, an evolutionary biologist, recounts his fieldwork in the 1980s, observing firsthand the ecological and evolutionary changes resulting from the introduction of the Nile perch, a predatory fish. This event led to the extinction of numerous cichlid species, which had been remarkably diverse and a key example of adaptive radiation. The narrative combines scientific observation with reflections on the broader implications of biodiversity loss and the complex relationship between humans and the natural world.

The 9742nd greatest book of all time