Robinette Broadhead is on his way to making a fortune by bankrolling an expedition to the Food Factory--a Heechee spaceship that can graze the cometary cloud and transfor the basic elements of the universe into untold quantities of food. But even as he gambles on the breakthrough technology, he is wracked with the guilt of losing his wife, poised forever at the "event horizon" of a black hole where Robin had abandoned her. As more and more information comes back from the expedition, Robin grows ever hopeful that he can rescue his beloved Gelle-Klara Moynlin. After three and a years, the factory is discovered to work, and a human is found aboard. Robin's suffering may be just about over.... 

Pohl embraces the sense-of-wonder flavor of classic big-concept science fiction (the vastness and grandeur of the universe, the cosmic sweep of time and space), mixes it with the mystery of ancient vanished alien's and near-magic technology, and presents it all within the character-driven framework of the best of New Wave inner-space speculation.