"Scouted by a modeling agent when she was just sixteen years old, Cameron Russell first approached her job with some reservations: She was a precocious and serious student with her sights set on college-not the runway. But it was a job, and modeling seemed to offer young women like herself access to wealth, fame, and influence. Besides, as she was often reminded, "there are a million girls in line" who would eagerly replace her. A ferocious, visceral...