Killday

In Level Five, the debut near-future thriller by Nebula Award winner William Ledbetter, AIs battle for dominance, and nanotechnology is on the loose. And all that stands in the way of the coming apocalypse is a starry-eyed inventor who dreams of building a revolutionary new spacecraft and an intelligence agency desk jockey faced with the impossible choice of saving her daughter - or saving the world.

Fifteen years after warring artificial intelligences nearly destroyed Earth, a young woman finds an artifact from that struggle, upsetting a delicate balance of power and dragging her into the middle of a new fight for humanity's survival.

In Level Seven, the exciting culmination of the Killday series, AIs strive to evolve into a super intelligence and might destroy humanity in that pursuit. But could their hopes of achieving godhood actually lie with the nearly extinct humans they intend to eradicate?