Luzifers Hammer by Larry Niven, Jerry Pournelle

In a gripping tale of survival and societal collapse, a massive comet hurtles towards Earth, triggering catastrophic events that reshape the planet's landscape and humanity's future. As civilization crumbles, a diverse group of individuals, from scientists to everyday citizens, must navigate the chaos and forge new alliances to endure the harsh new world. The story explores themes of resilience, the fragility of human society, and the enduring spirit of cooperation amidst the backdrop of apocalyptic destruction.