Issued monthly by Readers' Guild, Inc., 80 Lafayette Street, New York, N. Y. W. M. Clayton, President; Francis P. Pace, Secretary. Entered as second-class matter December 7, 1929, at the Post Office at New York, N. Y., under Act of March 3, 1879. Title registered as a Trade Mark in the U. S. Patent Office. Member Newsstand Group--Men's List. For advertising rates address E. R. Crowe & Co., Inc., 25 Vanderbilt Ave., New York; or 225 North Michigan Ave., Chicago. * * * * * Monsters of Mars A COMPLETE NOVELETTE _By Edmond Hamilton_ [Illustration: _The Martian gestured with a reptilian arm toward the ladder._] [Sidenote: Three Martian-duped Earth-men swing open the gates of space that for so long had barred the greedy hordes of the Red Planet.] Allan Randall stared at the man before him. "And that's why you sent for me, Milton?" he finally asked. The other's face was unsmiling. "That's why I sent for you, Allan," he said quietly. "To go to Mars with us to-night!" There was a moment's silence, in which Randall's eyes moved as though uncomprehendingly from the face of Milton to those of the two men beside him. The four sat together at the end of a roughly furnished and electric-lit living-room, and in that momentary silence there came in to them from the outside night the distant pounding of the Atlantic upon the beach. It was Randall who first spoke again. "To Mars!" he repeated. "Have you gone crazy, Milton--or is this some joke you've put up with Lanier and Nelson here?" [Illustration] Milton shook his head gravely. "It is not a joke, Allan. Lanier and I are actually going to flash out over the gulf to the planet Mars to-night. Nelson must stay here, and since we wanted three to go I wired you as the most likely of my friends to make the venture." "But good God!" Randall exploded, rising. "You, Milton, as a physicist ought to know better. Space-ships and projectiles and all that are but fictionists' dreams." "We are not going in either space-ship or projectile," said Milton calmly. And then as he saw his friend's bewilderment he rose and led the way to a door at the room's end, the other three following him into the room beyond. * * * * * It was a long laboratory of unusual size in which Randall found himself, one in which every variety of physical and electrical apparatus seemed represented. Three huge dynamo-motor arrangements took up the room's far end, and from them a tangle of wiring led through square black condensers and transformers to a battery of great tubes. Most remarkable, though, was the object at the room's center.