"Countdown" is a gripping science fiction thriller penned by renowned British author Alan Weisman. Set in a post-apocalyptic world, the novel follows a group of survivors as they navigate a world on the brink of collapse due to a mysterious global catastrophe. With themes of survival, human resilience, and the consequences of environmental degradation, "Countdown" offers a thought-provoking exploration of humanity's impact on the planet. Weisman's expert storytelling and vivid imagery make this a compelling read for fans of dystopian fiction and environmental themes.