After a galaxy-wide war had left the planetary federation in ruins, every surviving civilized world was on its own. And that was a perfect setup for the marauders from the far-out rim.

Trask was one of those dreaded Space Vikings, a warrior spaceman with a crew and a ship that struck terror to a thousand worlds. But Trask had a special personal interest In scourging the stars—he wanted to draw upon himself the fire of a certain enemy—a renegade planet-wrecker with a yen for galactic empire building.

Ace Book F-225 40¢

Available at this price (plus 5¢ handling fee) from Ace Books, Inc. (Dept. MM), 1120 Avenue of the Americas, New York, N.Y. 10036

Here's a quick checklist of recent releases of
ACE SCIENCE-FICTION BOOKS

40¢

F-231 STAR GATE by Andre Norton
F-236 THE TIME TRADERS by Andre Norton
F-237 THE SHIP FROM OUTSIDE by A. Bertram Chandler
and BEYOND THE GALACTIC RIM by A. Bertram Chandler
F-239 TIME AND AGAIN by Clifford D. Simak
F-240 WHEN THE SLEEPER WAKES by H. G. Wells
F-241 STAR BRIDGE by Jack Williamson and J. Gunn
F-242 THE RITES OF OHE by John Brunner
and CASTAWAYS' WORLD by John Brunner
F-243 LORD OF THUNDER by Andre Norton
F-246 METROPOLIS by Thea von Harbou
F-248 BEYOND THE STARS by Ray Cummings
F-249 THE HAND OF ZEI by L. Sprague de Camp
and THE SEARCH FOR ZEI by L. Sprague de Camp
F-251 THE GAME-PLAYERS OF TITAN by Philip K. Dick
F-253 ONE OF OUR ASTEROIDS IS MISSING by Calvin M. Knox
and THE TWISTED MEN by A. E. van Vogt
F-255 THE PRODIGAL SUN by Philip E. High
F-257 ALIEN PLANET by Fletcher Pratt
F-259 PRINCE OF PERIL by Otis Adelbert Kline
F-261 THE TOWERS OF TORON by Samuel R. Delany
and THE LUNAR EYE by Robt. M. Williams
F-263 WEB OF THE WITCH WORLD by Andre Norton

If you are missing any of these, they can be obtained directly from the publisher by sending the indicated sum, plus 5¢ handling fee, to Ace Books, Inc. (Dept. M M), 1120 Avenue of the Americas, New York, N.Y. 10036

"Is there really a Merlin?"
Everybody on the war-torn planet Poictesme believed it existed. And they all believed that when this super-gigantic computer was located amid the mountains of surplus equipment that was the planet's sole source of revenue, it would mean Utopia for everyone.
Conn Maxwell knew different. He had studied the records on Earth and he thought he knew the true facts about this cosmic computer. To tell them would be to panic Poictesme, so instead he set about a new search in his own way—with startling results.
H. Beam Piper, author of SPACE VIKING, has again produced an original and unusual novel of the space future.