Then in mere seconds it hung over them, no longer tiny but a giant tower of polished metal hanging over the crater floor, falling ever more slowly, its great column of rocket fire reaching and scorching the surface of the rock. And suddenly, the fire was gone, there was a faint thud felt through the ground, and the two brothers stood staring. Out there, not very distant, was standing a glorious, tall, slender rocket ship, fresh with paint, beautifully and delicately balanced on finely tapered fins, graceful as only a space craft can be. On its side, clearly visible in the sunlight, was a large blue circle on which was superimposed the white star of the United States Air Force. There were numbers and things and a small, black air lock now opening near the nose of the rocket, but Robin and Peter hardly noticed these through the tears of joy that sprang to their eyes as they ran and bounded over the Moon's surface to greet their rescuers. Waving their hands, shouting, heedless of whether they were being heard, they were Robinson Crusoes no longer. They were on their way home. _ABOUT THE AUTHOR_ Donald A. Wollheim, born in 1914, has lived in New York City all his life. At first a free-lance writer of stories and articles mainly for science-fiction magazines, he began his career as editor in 1940. He has edited all kinds of magazines, including detective, sports, and western periodicals. In 1952, Mr. Wollheim was invited to launch Ace Books and has since held the position of editor of these paperbacks. Science fiction is Mr. Wollheim's chief interest and hobby. His collection of science-fiction books and magazines is one of the largest and his list of published books is a long one. Many distinguished anthologies of fantasy and science fiction bear his name as editor. Among his most recent books of original fiction are _The Secret of Saturn's Rings_ and _The Secret of the Martian Moons_. End of Project Gutenberg's One Against the Moon, by Donald A. Wollheim