Simmis

From the #1 New York Times bestselling author of Anathem, The Reamde Virus, and The Kryptonomicon, read a thrilling and thought-provoking sci-fi, a grand story of destruction and survival spanning five thousand years.
What will happen after the end of the world?
The moon exploded suddenly and for no reason at all. Earth has become a ticking time bomb. In search of salvation from the inevitable, the nation of the whole world united to implement an ambitious plan to save humanity far beyond the borders of the planet, in open space.
But the complexity and unpredictability of human nature, combined with incredible challenges and dangers, threatened the intrepid pioneers until there were very few people left...
Five thousand years later, their descendants, seven different races, began another daring journey to an unknown, alien world, completely destroyed by cataclysm and time, called Earth.