Cool is a compendium of global youth subcultures and street styles--from Flappers to Swing Kids, to Goths to today's Normcore--that have shaped the fashion zeitgeist. It's no secret that the youth of the world buck conventional mainstream culture every chance they get, blazing countercultural trails in the process. Driven by their thirst for art and music, and their environment, young people combine their inspirations with the innate desire to rebel,...