Untitled is the third volume of Diane Arbus's work and the only one devoted exclusively to a single project. The photographs were taken at residences for the mentally retarded between 1969 and 1971, in the last years of Arbus's life. Although she considered doing a book on the subject, the vast majority of these pictures remained unpublished prior to this volume. These photographs achieve a lyricism, an emotional purity that sets them apart from all...