Las Vegas is the most dynamic, spectacular city on earth. At the start of the twentieth century, it didn't even exist; at the start of the twenty-first, it's home to well over one million people, with enough newcomers arriving to need a new school every month.Las Vegas is not like other cities. No city in history has so explicitly valued the needs of visitors above those of its own population. All its growth has been fueled by tourism, but the tourists haven't spoiled the "real" city; there is no real city. Las Vegas doesn't have fascinating little-known...