Susan Lee Sontag was an American writer, critic, and public intellectual. She mostly wrote essays, but also published novels; she published her first major work, the essay "Notes on 'Camp' ", in 1964. Her best-known works include the critical works Against Interpretation (1966), On Photography (1977), Illness as Metaphor (1978) and Regarding the Pain of Others, as well as the fictional works The Way We Live Now (1986), The Volcano Lover (1992), and In America (1999).

On Photography is a 1977 collection of essays by American writer Susan Sontag. The book originated from a series of essays Sontag published in the New York Review of Books between 1973 and 1977.