Before the sun dies and the Earth's core cools, before the zombies tear down the skyscrapers and all the pages are ripped from the library books, our species may already have long withered away in a virtual dystopia of failing beauty, faux terrors, and digitally-rendered hopes. Or if not all mankind, at least Manhattan. Such is the bleak path Jonathan Lethem lustrously figures in Chronic City. His subtly ambitious eighth novel explores the extent to which the virtual shadows of our postmodern world, interposed and clanging, proliferate and intensify even as they begin to cancel one another out.