To escape the tyranny on Terra in the year 2500, a group of scientists make a last-minute getaway under fire and take off for another planet in another solar system. Their adventures make top-flight entertainment for all science-fiction fans. $3.00 SPACE SERVICE _Edited With an Introduction and Notes by Andre Norton_ Ten great stories by such leading science-fiction writers as Bernard I. Kahn, H. B. Fyfe, Walt Sheldon, Theodore R. Cogswell, and Raymond Z. Gallun that will delight all science-fiction fans with their portrayals of adventure in a far-flung galactic empire. $2.50 SPACE PIONEERS _Edited With an Introduction and Notes by Andre Norton_ A collection of outstanding stories by some of the finest writers in the science-fiction genre--Eric Frank Russell, H. B. Fyfe, Raymond Z. Gallun, Fritz Lieber, Jerome Bixby, and others--that presents a startling glimpse into the future of space travel, artificial satellites, and colonization--a vision that comes closer to reality every day. $2.75 SPACE POLICE _Edited With an Introduction and Notes by Andre Norton_ Nine top science-fiction writers are brought together in this fine collection of short stories that presents yet another aspect of the picture of future worlds and civilizations envisioned in _Space Pioneers_ and _Space Service_. $2.75