Introduction -- The coming of the penumbral age -- The frenzy of fossil fuels -- Market failure -- Epilogue. In 2393, a historian of the Second People's Republic of China reviews the "Penumbral Age" (1988-2093), when politicians, corporations, and scientists ignored the statistical significance of climate disaster. Carbon dioxide warming the planet, deadly summer heat and fires, and the collapse of the West Antarctica Ice Sheet lead to a second Black Death and "the Great Collapse" of the Western world. In this haunting, provocative work of science-based fiction, Naomi Oreskes and Eric M. Conway imagine a world devastated by climate change. Dramatizing the science in ways traditional nonfiction cannot, the book reasserts the importance of scientists and the work they do and reveals the self-serving interests of the so called "carbon combustion complex" that have turned the practice of science into political fodder. Based on sound scholarship and yet unafraid to speak boldly, this book provides a welcome moment of clarity amid the cacophony of climate change literature.