Galactic Center

After the events of Across the Sea of Suns, small groups of humans have settled on other star systems. However, there is a constant threat from the Mechs, a civilization of machines left over from other civilizations and evolved to see all biological civilization as unstable and dangerous. Great Sky River tells the story of the Bishop family, who fight for their very existence on the planet Snowglade, which has been taken over by the Mechs. The Bishops are one of a number of families on Snowglade, all named for chess pieces. These "families" are more like clans or tribes. All use cybernetic implants and mechanical aids to enhance their perceptions and physical abilities. Personalities of dead members of the Family can be stored in memory tabs and accessed by plugging them into ports implanted in the neck. Bodily functions, such as the sexual drive, can be turned off to remove distractions. The Families seem to be equipped for long conflicts and periods of privation, continually migrating to avoid the Mechs.

Now in a new, revised edition, the fourth book of the Nebula Award-winning author's Galactic Center series is a classic tale of man's future and fate--and the greatest mystery from outer space that humanity has ever encountered.

Containing the remnants of humanity from the planet Snowglade, the spaceship Argo hurtles toward its uncertain destiny, the bold and brilliant Captain Killeen at its helm. But he has grown increasingly isolated and anguished in command. The ship's gardens are failing, its voyagers face starvation, and there are dark whispers within, talk of mutiny. Killeen's will, however, remains as strong as ever, his determination to reach the True Center of the galaxy bordering on obsession. Amid a mad swirl of incandescent suns and ghostly blue clouds of galactic dust, beset by hostile worlds controlled by the mechs-a vast and violent artificial intelligence whose only meaning, only mission, is the complete extermination of the human race-Killeen pursues his desperate search, convinced his people's one hope of survival lies in the True Center. The crew has followed him this far on faith, a faith now being tested to the limit. Even his own son Toby, groomed for leadership, is beginning to question his father's command. As the Argo undertakes a perilous quest into the unknown, Toby faces his own journey into the mysteries of adulthood. Like the others in this Family of voyagers, Toby's spine contains microchip implants holding the memories-the legacy-of his race. But just as the technology designed to save his people may tear Toby himself apart, so his father's desperate gamble to save the Argo may plunge the ship and its inhabitants into a cosmic pit of all-consuming fire.