Azimuth: Arc of Visibility
Hundreds of years in the future humankind has perfected nanotechnology to such an extent that environmental disaster, poverty, illness, and even death seem to have been eradicated. However, in all their ingenuity, life has been prolonged but not conquered, and nanobots have become both the salvation and devastation of civilization.
The first mysterious nanocide wiped out more than half the world's population, the second wiped out all but fifty-seven. Now only one man stands between humanity's last hope, the Azimuth, a modern age Noah's ark with the ability to resurrect everyone in its database, and those trying to destroy it. But he is not alone.
A horde of five thousand corpses reanimated by their nanobots are following him, and he doesn't know why.