On the occasion of the exhibition 'William Eggleston Portraits' at the National Portrait Gallery, David Zwirner hosted a rare book signing with William Eggleston at the London gallery, in partnership with The Photographers' Gallery. Eggleston is a pioneering American photographer renowned for his vivid, poetic and mysterious images. This exhibition of 100 works surveys Eggleston’s full career from the 1960s to the present day and is the most comprehensive display of his portrait photography ever. Eggleston is celebrated for his experimental use of color and his solo show at the Museum of Modern Art, New York, in 1976 is considered a pivotal moment in the recognition of color photography as a contemporary art form. William Eggleston 'Portraits' will be on view from July 21 to October 23 at National Portrait Gallery in London. photographs by Flo Kohl