Endgame enigma

From back cover Bantam paperback November 1988: IT MIGHT BE A STEP BEYOND STAR WARS... AND ONE STEP CLOSER TO WORLD WAR III. It is the near future. With its power and influence waning, the Soviet Union has launched Valentina Tereshkova, a giant space station capable of housing 12,000 citizens, into orbit around the earth. But is the colossal off-world colony the peaceful Utopian experiment it's alleged to be? Or is it the last desperate weapon of a crumbling superpower bent on global domination? U.S. computer scientist Paula Bryce and agent Lew McCain are sent to learn the truth -- only to…