In Hold Up the Sky, Cixin Liu takes us across time and space, from a rural mountain community where elementary students must use physics to prevent an alien invasion; to coal mines in northern China where new technology will either save lives of unleash a fire that will burn for centuries; to a time very much like our own, when superstring computers predict our every move; to 10,000 years in the future, when humanity is finally able to begin anew; to the very collapse of the universe itself...