This outstanding short story collection mostly contains stories that are set in deep space, as opposed to his other collections where the setting tends to be planetbound. The first is the excellent “Rammer” (which formed the basis for A World Out of Time), in which a man revived from cryogenic sleep is forced to pay his debt to society by going on a centuries long mission to “seed” potential colony worlds. There is also an essay on space habitats, including Niven’s Ringworld concept.
