On the planet Jijo, peace is upended when the starship Streaker arrives, bringing with it knowledge of a two-billion-year-old fleet and hordes of followers eager to exploit its power. Publishers Weekly hails Brin's "extraordinary capacity to handle a wide-ranging narrative and to create ... complex alien races."

Persecuted refugees from six separate alien races have migrated to the idyllic planet Jijo. And despite their incredible diversity, the inhabitants live together in blissful harmony. However, settlement on Jijo is illegal - and it's only a matter of time before the residents of this forbidden paradise are discovered by the galactic powers-that-be.

When Streaker - the first starship designed and crewed by dolphins - discovers a derelict ancient armada with evidence of the first sentient species ever, she sets off a war between dozens of galactic races eager to use the information for their own advancement.

For nearly a billion years, every known sentient species in the universe has been the result of genetic and cultural guidance - or "uplifting" - by a previously uplifted patron race. Then humans are discovered. Having already uplifted chimps and dolphins, humanity clearly qualifies as an intelligent species, but did they actually evolve their own intelligence, or did some mysterious patron race begin the process, then suddenly abandon Earth?

Earth has been allowed to colonize the planet Garth only because its previous occupants went berserk and wiped out virtually all life there. But now humans, chimps, and their alien allies on Garth are being held hostage in a conflict that could affect the fate of the entire Five Galaxies.