I'm always one to dig a little deeper when it comes to understanding where certain styles and fashions originate. If you're curious like me, check out the upcoming . . . Isms: Understanding Fashion ($12), by Mairi MacKenzie. In this cute, pocket-sized book, Mairi explores which fashions — such as Neoclassicism, Industrialism, Punk, and Existentialism — came first, and which trends will come next. Cool. Also included are her theories on how culture has played a huge role on influencing fashion cycles and trends. Why did '70s music trigger the popularity of dog collars and safety-pinned clothes — Sex Pistols, anyone?