The avant-garde writer Kathy Acker liked to say that she wasn’t one person but many. “I’m sure there are tons of Kathy Ackers,” she told an interviewer late in her career. A quick study of her life bears this out. She was the disappointing Karen Alexander, a self-described “good little girl” who didn’t dare challenge her parents until she was in her teens. She was the intimidating woman at the loft party, with “harsh makeup and amazing punk hair,” who nonetheless struck perceptive observers as “fragile” and “childlike.” She was a sex worker, an office temp, a college instructor, and one of the most famous writers on the London scene. Later in life, she was something of a feminist icon, a muscle-bound motorcycle rider who enjoyed being photographed topless, the better to flaunt her tattoos.