The next time you are in an American bookstore, take a look at the science-fiction section; in some stores, it is almost as big as all of the other fiction categories put together. Walk into a So- viet bookstore these days, and you'll find . . . probably no sci- ence fiction at all. Go to a Soviet secondhand bookshop, and your chances of finding science fiction there will be equally slim. But take a stroll past the Moscow Art Theater to where Pushkin Street intersects Kuznetskii Most, and you'll...