A writer and his daughter wander the ancient city at night, inspired by Joseph Brodsky, the Russian writer who loved the city in its cold, quiet season.
He conceived an early version of cyberspace and predicted the “technological singularity,” a tipping point at which machines would become smarter than humans.
An influential photography critic, she wrote essays, newspaper columns and books, including a notable biography of the photojournalist Margaret Bourke-White.