Sir Paul McCartney first picked up a guitar as a bereaved teenager in 1956. In the fifty years since hes become the most successful pop music composer in history, enjoying a virtual season ticket to the Guinness Book of Records. McCartneys ballad Yesterday, which he wrote in his sleep, has since been covered by 2,400 other artists - making it the most popular song of all time. Now Christopher Sandford reveals the man behind the myth...Among the eye-opening stories is the surprising love-hate relationship with John Lennon, not to mention with Lennons widow, as well as an insiders ...