'Mad Day Out': Beatles' Rare Photos

Don McCullin / Contact Press Images

Let Me Take You Down
McCartney contributes a prologue to the book, in which he explains, "We were looking for something different. We knew of Don from his war photography ... We'd been photographed by just about everybody ... Avedon, Parkinson, Bailey. We knew how good Don was. We thought, We've got to be the war. We'll provide the battlefield, and it'll work. He'll just click into action. That's exactly what happened."

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