RollingStone.com is featuring photos of Johnny Cash from the book “Pocket Cash” by photographer Jim Marshall. He first met Johnny in 1962 while photographing for Columbia Records, and was requested to document the sessions at Folsom and San Quentin, as well as the Johnny Cash Show. Marshall published a number of exclusive photos in the book, which features an introduction by John Carter Cash. You can purchase “Pocket Cash” at Amazon.com, and get a preview of some of the photos, and Marshall’s recollections, at RollingStone.com.