Sittenfeld was a junior at Princeton University. She photographed her friends on medium-format film, and the shots eventually ended up collecting dust in her parents' closet. But last spring, as her fifteen-year college reunion was approaching, she remembered the photos and...

Sittenfeld was a junior at Princeton University. She photographed her friends on medium-format film, and the shots eventually ended up collecting dust in her parents' closet. But last spring, as her...