A monumental epic tale of space exploration and alien contact from one of science fiction's greatest writers

In the future, humankind has taken only limited advantage of a miraculous gift left for it in the far-distant past. A beneficent and inscrutable alien race called the Others has provided "gates" that enable passage to all corners of the galaxy. But after the colonization of a single star system, a repressive government on Earth has forbidden all further explorations, seizing the returning starship Emissary and taking its crew captive along with an alien passenger the vessel encountered on its voyage.
 
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