Sigrid Nunez was an aspiring writer when she first met Susan Sontag, already a legendary figure known for her polemical essays, blinding intelligence, and edgy personal style. Sontag introduced Nunez to her son, the writer David Rieff, and the two began dating. Soon Nunez moved into the apartment that Rieff and Sontag shared. As Sontag told Nunez, “Who says we have to live like everyone else?”