THE GALAXY'S
IN DANGER—SEND FOR
HANS REBKA

Hans Rebka, interstellar troubleshooter, thought he had done it all by now—not only solving the mystery of the gigantic Artifacts which a vanished race called the Builders had left behind millions of years ago, but also preventing the warlike and tyrannical Zardalu from regaining their onetime dominance of the galaxy. He figured he was entitled to work on smaller problems that only involved one planet at a time. Unfortunately, he is about to find that his earlier exploits were only a warm-up for the main event.

In the Sagittarius Arm of the galaxy, something is destroying whole stellar systems. Only the Builders could have the power to snuff out whole stars and planets, but if the mysterious super-race has returned, why should they bring a wave of cosmic destruction with them Has a new, malevolent super-race arisen

Rebka reassembles his old motley crew of humans and aliens to investigate. But when they arrive in the beleagured spiral arm, they become trapped on a planet directly in the path of destruction. And they must escape, for they have learned the secret of the destroyed star systems: a battle is beginning that will determine the ultimate fate of the galaxy itself.

ABOUT THE AUTHOR

Charles Sheffield, a mathematician and physicist, is a past president of both the American Astronautical Society and the Science Fiction Writers of America, and the chief scientist of the Earth Satellite Corporation. He has published over a hundred technical papers and monographs on such subjects as nuclear physics, gravitational field analysis, and general relativity, and an equally large body of popular science articles for the layman. He serves as a science reviewer for several prominent publications.

In science fiction, Dr. Sheffield has received the coveted Nebula and Hugo Awards, as well as the John W. Campbell Memorial Award for his novel for Baen, Brother to Dragons. His other SF novels for Baen include Between the Strokes of Night, The Mind Pool and its sequel The Spheres of Heaven, and two prequels to Resurgence: Convergent Series and Transvergence. He is also the author of Borderlands of Science: How to Think Like a Scientist and Write Science Fiction, which is both a nonfiction survey of current scientific frontiers and an explanation of how a science fiction writer can write SF using bona fide scientific knowledge. Which is just the sort of SF that Dr. Sheffield has been writing for some time now, to the resounding acclaim of readers and critics alike.