Synopsis: From the dust jacket front flap: "It had been twelve hundred years since a Tandar space ship had left from in front of the Palace, so reporters were certain that this cruise was to be out of the ordinary. But even they could hardly believe that the ship would venture out of the Dark Sector into the one portion of the galaxy which had never been penetrated and which held all the peril of the unconquered and the unknown. The encounter with a charming denizen of Venus, the sight of earth destroying itself in a nuclear war, and the final confrontation with the great ships of the lost planet Kusor lend excitement to this dramatic science fiction novel."