The two-time Hugo Award-winner expands the universe of his Coyote saga. The danui, a reclusive arachnid species considered the galaxy's finest engineers, have avoided contact with the Coyote Federation. Until, that is, the danui initiate trade negotiations, offering only information: the coordinates for an unoccupied world suitable for human life-a massive sphere, composed of billions of hexagons. But when the Federation's recon mission goes terribly wrong, the humans realize how little they know about their new partners...