TWO EPIC SCIENCE FICTION NOVELS BY A "NEW YORK TIMES "BEST SELLING AUTHOR TOGETHER IN ONE VOLUME: "New York Times" bestseller "Endgame Enigma "and Promethius Award winner "Voyage from Yesteryear"."" "Endgame Enigma" "New York Times" bestseller. In the near future, Russia has built "Valentina Tereshkova," a space station a mile in diameter, a shining city in space. Its builders claim that the orbiting space city is a peaceful Utopian experiment, but...