An ancient starship from Earth reaches its destination after four hundred years of travel and makes a life-changing discovery in this compelling space opera.

“MacLeod . . . delivers perhaps the finest novel of first contact since Vernor Vinge’s A Deepness in the Sky. . . . This is contemporary SF at its best.”—Publishers Weekly

Humanity has spread to every star within five hundred light-years of its half-forgotten origin, coloring the sky with a haze of habitats. Societies rise and fall. Incautious experiments burn fast and fade. On the fringes, less modified humans get on with the job of settling a universe that has, so far, been empty of intelligent life.

The ancient starship But the Sky, My Lady! The Sky! is entering orbit around a promising new system after a four-hundred-year journey. For its long-lived inhabitants, the centuries have been busy. Now a younger generation is eager to settle the system. The ship is a seed-pod ready to burst.

Then they detect curious electromagnetic emissions from the system’s Earth-like world. As the nature of the signals becomes clear, the choices facing the humans become stark.

On Ground, second world from the sun, a young astronomer searches for his system’s outermost planet. A moving point of light thrills, then disappoints him. It’s only a comet. His physicist colleague Orro takes time off from trying to invent a flying-machine to calculate the comet's trajectory. Something is very odd about that comet's path.

They are not the only ones for whom the world has changed . . .

“Highly entertaining.” —Locus 

“MacLeod continues to dazzle readers with vividly rendered landscapes of technological splendor and fascinating yet plausible visions of humanity’s future.” —Booklist