Hawksbill Station

Hawksbill Station, in the gray and utterly barren Cambrian era, was the ideal prison enclave for an authoritarian government too civilized to execute men for subversion, and too cowardly to allow them freedom. A billion years of impassable time was sufficient insulation for even the most dangerous ideas. But this exile was a ticket to despair and madness, with death the only pardon... Then a newcomer dropped form the one-way time transit device that had deposited them all here—-a man who knew nothing of the world he had come from and found out too much of the world he was in... The stranger bore a threat to the very existence of HAWKSBILL STATION.