When Raf Kurbi's Terran spaceship burst into unexplored skies of the far planet Astra and was immediately made welcome by the natives of a once-mighty metropolis, Kurbi was unaware of three vital things:One was that Astra already harbored an Earth colony—descended from refugees from the world of the previous century.Two was that these men and women were facing the greatest danger of their existence from a new outburst of the inhuman fiends who had once tyrannized Astra.Three was that the natives who were buying Kurbi's science know-how were those very fiends—and their intentions were implacably deadly for all humans, whether Earth born or STAR BORN.It's an Andre Norton space adventure—and therefore the tops in its field!