In early 1964, photographer Harry Benson received a call from the photo editor of London's Daily Express, who asked him to cover the Beatles' trip to Paris. It was the beginning of a career-defining relationship, which would both make Benson's name and produce some of the most intimate photographs ever taken of the Beatles. In Paris, Benson captured the Fab Four in the midst of a pillow fight at the George V Hotel, a spontaneous moment which came...