The relationship between John Lennon and Paul McCartney was the dynamic centre of all that the Beatles did, of all they achieved as musicians and as cultural icons. Noted rock biographer Geoffrey Giuliano delves into the little-known details of John and Paul's friendship to reveal how what was happening in their lives influenced their songs. He analyzes the songs and the albums, addressing each musician's respective contributions in writing and recording. In addition, Giuliano provides a discography, a chronology, and information on songs written for other artists that were never released commercially.