The month in photography
Welcome to the Observer New Review's monthly guide to the 20 best photographic exhibitions and books, with images by Sebastião Salgado, Sally Mann, Wolfgang Tillmans, Nadav Kander, Philip Jones Griffiths, Tim Hetherington, Bruce Davidson, Richard Avedon and many more
Click the play button to watch the slideshow; click on 'captions' for information on the photographs; pause and click on the links in the captions to be directed to relevant articles, galleries and websites