Following below’s link you can find a free version of Bruno Latour’s ‘Paris invisble’. According to his latest more theoretical book on actor network theory ‘reassembling the social – an introduction to Actor-Network-Theory’ (2007) this text should be the much lighter version … which tries to cover much of the same ground through a sucession of photographic essays. It is also much shorter then the introductory book

http://www.bruno-latour.fr/virtual/PARIS-INVISIBLE-GB.pdf