Martin Parr's celebrated photographic work bridges the divide between art and documentary photography. His studies of the idiosyncrasies of mass culture and consumerism around the world, his innovative imagery, and his prolific output have placed him firmly at the forefront of contemporary art. Parr is a member of the international photo agency Magnum, and has recently branched out into film-making. He is a world authority on photobooks. Gerry Badger is a photo historian and critic. He writes and lectures on photography regularly and has curated a number of exhibitions, including 'The Photographer as Printmaker' for the Arts Council of Great Britain and 'Through the Looking Glass: Post-war British Photography' for the Barbican Arts Centre, London. His published books include Collecting Photography (2003) and books on Eugene Atget and Chris Killip (both published by Phaidon). He is currently completing a major book on the Berlin work of the American photographer, John Gossage.