Paul McCartney is finally opening up one of the most fascinating chapters of his life. Wings : The Story of a Band on the Run is the new book on McCartney in the 1970s — how he started over and found his own voice after the demise of the Beatles. Rolling Stone  has an exclusive excerpt of Paul reading from the audiobook, including his witty imitation of Mick Jagger . “For so many decades,” McCartney recalls in the excerpt, “I tried to pack away these stories about how I felt when the Beatles