A science fiction epic from "the best writer in America" (Tom Clancy)amp;mdash;Hugo and Nebula award-winning author John Varley.

Fleeing Earth after an alien invasion, the human race stands on the threshold of evolution. Their new home is Luna, a moon colony blessed with creature comforts, prolonged lifespans, digital memories, and instant sex changes.

But the people of Luna are bored, restless, suicidalamp;mdash;and so is the computer that monitors their existence . . .