Earth

Humanity is threatened with extinction in this far future science fiction adventure from the Hugo Award–winning author.

A wave of lethal gamma radiation is expanding from the core of the Milky Way galaxy at the speed of light, killing everything in its path. The countdown to when the death wave will reach Earth and the rest of the solar system is at two thousand years.

Humans were helped by the Predecessors, who provided shielding generators that can protect the solar system. In return, the P...