Balant

Balant, the first of the five books series The unMaking of Heaven. Dag Olvess, Malamud Bey and Pi Pandy are marooned on the very edge of the known universe. En route from Pi's mother's substation to a university in another galaxy, the ship encountered a storm of cosmic proportions. About to implode, Pi escapes in the shuttle with two other young men, Malamud Bey and Dag Olvess. They end up on the planet Balant where they adapt to cave life. Finding an abandoned robot they repair the shuttle, investigate the planet, discover that they share it with some primitive savages and a marine intelligence, called the Nautili, who are also capable of intergalactic travel. But can they get home?