Book excerpt: For forty years, Christo and Jeanne-Claude, the husband-and-wife team behind countless headline-grabbing art projects all over the world, have been challenging our view of the world - natural or man-made - by giving us wrapped creations of dizzying magnitude and daring beauty, such as 'Surrounded Islands', which consisted of enveloping eleven islands with seven square miles of hot pink material. This is the first fully authorised biography of these celebrated and controversial artists, illustrated with 50 b/w photos and one 16-page colour photo insert.