Photographer Jim Marshall captured some of the most notable musicians in historic candid shots still remembered today: Janis Joplin with whiskey bottle and the Beatles racing across Candlestick Park at the end of their final public performance: but what about some of his other shots. Proof shares his contact sheets from the concerts, sessions and sittings of his more famous shots. These contact sheets, nicely accompanied by background history and explanations of the photographic methods and shot settings, are outstanding representations and when viewed here as a unit and package, explain the origins of the famous works. Highly recommended.