n the gray darkness the curved fangs of a saber-toothed tiger gleamed white and ghostly. The man-figure that stood half crouched in the mouth of the cave involuntarily shivered. Rawson learns to his cost that the life-spark of a fabled race glows in the black heart of a dead, Western volcano. "Gwanga!" he said. "He goes, too!" But the man did not move more than to shift a club to his right hand. Heavy, that club, and knotted and with a head of... more...

The Director General of District Three, Ural Division of the Russian States, was a fool. Danny O'Rourke had reached that conclusion some time before—a conclusion, however, that he was most careful to keep unexpressed. Like the Hammer of Thor was the clash of Danny O'Rourke with the mysterious giant of space.   And then Danny not only thought it; he knew the Director was a fool; and the amazing incident that proved it took place in... more...

CHAPTER I SOS The venerable President of the Federation Aeronautique Internationale had been speaking. He paused now to look out over the sea of faces that filled the great hall in serried waves. He half turned that he might let his eyes pass over the massed company on the platform with him. The Stratosphere Control Board—and they had called in their representatives from the far corners of Earth to hear the memorable words of this aged... more...

The Message Once more Chet, Walt and Diane are united in a wild ride to the Dark Moon—but this time they go as prisoners of their deadly enemy Schwartzmann. In a hospital in Vienna, in a room where sunlight flooded through ultraviolet permeable crystal, the warm rays struck upon smooth walls the color of which changed from hot reds to cool yellow or gray or to soothing green, as the Directing Surgeon might order. An elusive blending of... more...