If it is possible to conquer space, then perhaps it is also possible to conquer time. At least that was the theory American scientists were exploring in an effort to explain the new sources of knowledge the Russians possessed. Perhaps Russian scientists had discovered how to transport themselves back in time in order to learn long-forgotten secrets of the past. That was why young Ross Murdock, above average in intelligence but a belligerently independent nonconformist, found himself on a "hush-hush" government project at a secret base in the Arctic. The very qualities that made him a menace in civilized society were valuable traits in a man who must successfully act the part of a merchant trader of the Beaker people during the Bronze Age. For once they were transferred by time machine to the remote Baltic region where the Russian post was located, Ross and his partner Ashe were swept into a fantastic action-filled adventure involving Russians, superstitious prehistoric men, and the aliens of a lost galactic civilization that demanded every ounce of courage the Americans possessed. Andre Norton's earlier books, _Star Born_ and _The Stars Are Ours!_, have made this author one of the most popular writers in the science-fiction field. In this daring adventure into the mists of time, readers will find themselves transported to still more exciting "other" worlds. _Jacket by Virgil Finlay_ 0012 up $2.75 _Star Born_ by ANDRE NORTON Far from the Terran colony's Homeport on the planet Astra, young Dalgard Nordis and his merman companion Sssuri are suddenly confronted by their old enemies, the alien Astrans. Within the ruins of the Astrans' former citadel the two discover that remnants of this nonhuman race, which had once ruled the entire planet, are struggling to recover their lost knowledge and thus regain their power. Dalgard realizes that the safety of the Terrans is seriously threatened by this, and there is no hope of warning his people in time. When a space ship arrives from Terra, its crew ignorant of the existence of a Terran colony on the western continent across the sea, the aliens enlist the spacemen's aid. Of the members of the crew only young Raf Kurbi instinctively mistrusts the Astrans. Through a series of weird and exciting adventures among the ruins and in ancient underground tunnels, Raf eventually meets Dalgard and joins him in the fight against the aliens. In this sequel to _The Stars Are Ours!_ Andre Norton has produced another superb science-fiction adventure. _Jacket by Virgil Finlay_ THE WORLD PUBLISHING COMPANY SCIENCE FICTION by ANDRE NORTON STAR BORN _by Andre Norton_ Young Dalgard Nordis of the planet Astra and his merman companion Sssuri join forces with a space man from Terra to outwit resurgent nonhuman Aliens. A sequel to _The Stars Are Ours!_ $2.75 THE STARS ARE OURS! _by Andre Norton_