Just finished reading [amazon asin=”0801871670″&text=”Disappearing Witness: Change in Twentieth-Centu​ry American Photography”] by Gretchen Garner, in which she describes how photography (and not just in America) in the first half of the century was defined by what she calls ‘spontaneous witness’ (think Cartier-Bresson and the ‘decisive moment’), outward-looking, documentary, and in the second half became much more personal, inward-looking. It is a very easy read, her ‘story’ never drags and it is always informative.