First published in 1973, this is a study of the force of photographic images which are continually inserted between experience and reality. Sontag develops further the concept of 'transparency'. When anything can be photographed and photography has destroyed the boundaries and definitions of art, a viewer can approach a photograph freely with no expectations of discovering what it means. This collection of six lucid and invigorating essays, the most famous being "In Plato's Cave," make up a deep exploration of how the image has affected society.

Susan Sontag was born in Manhattan in 1933 and studied at the universities of Chicago, Harvard and Oxford. Her non-fiction works include On Photography, Regarding the Pain of Others and At the Same Time. She was also the author of four novels, including The Volcano Lover and In America, as well as a collection of stories and several plays. She was awarded the Jerusalem Prize, and received the Prince of Asturias Prize for Literature and the Peace Prize of the German Book Trade. She died in December 2004.