Uniformity is the defining feature; there is only one language and all ethnic groups have been eugenically merged into one race called “The Family.” The world is ruled by a central computer called UniComp that has been programmed to keep every single human on the surface of the earth in check. People are continually drugged by means of regular injections so that they will remain satisfied and cooperative. They are told where to live, when to eat, whom to marry, when to reproduce. Even the basic facts of nature are subject to the UniComp’s will—men do not grow facial hair, women do not develop breasts, and it only rains at night.

    The age of star formation is long past. Yet there is life here, feeding off the energies of the stellar remnants, and there is mind, a tremendous galaxy-spanning intelligence each of whose thoughts lasts a hundred thousand years. And this mind cradles memories of a long-gone age when a more compact universe was full of light... The 27th century: Proxima Centauri, an undistinguished red dwarf star, is the nearest star to our sun. How would it be to live on such a world?

    Trapped in 1877, a historian writes an account of an alternative history of America in which the South won the Civil War. Living in this alternative timeline, he was determined to change events at Gettysburg.When he's offered the chance to return to that fateful turning point his actions change history as he knows it, leaving him in an all too familiar past.

    But as adults they both wind up in near-future San Francisco, where Laurence is an engineering genius and Patricia works with a small band of other magicians to secretly repair the world’s ever growing ailments. But something is determined to bring them back together—to either save the world, or end it.