It scares--and titillates--in such movies as The Hand That Rocks the Cradle and Basic Instinct. It violently ended the lives of legendary artists such as Selena and John Lennon, and thousands of people endure it daily in anonymity from ex-lovers and strangers. Stalking has been a fact of human society for a surprisingly long time, yet it is only in the last two decades that the term "stalking" came into wide use throughout mass culture...