Harbinger

In the far future the poor won't be packed into the cities--they'll be cast out into the black. Jose Santiago wanders the outer reaches of the solar system looking for the a frozen treasure that will turn his life around. And racing against the greedy corporation that wants the treasure for itself. In this story, which won honorable mention in THE YEAR'S BEST SCIENCE FICTION edited by Gardner Dozois, Santiago will discover that comets are truly harbingers of ill fortune.