"In Disappearing Witness, photographer and art historian Gretchen Garner chronicles the transformation, from the introduction of the 35-millimeter camera in the 1920s to the digital photography of today. Accompanied by over 125 key works in the history of photography - fine-art, documentary, and editorial - her thoughtful and enlightening discussion traces American photography's aesthetic, commercial, and technological changes, as the medium's primary role of spontaneous witness gradually gave way to contrived arrangement and artistic invention."--Jacket.