 It includes material drawing on the American folk and country styles, and songs that anticipate British psychedelia in their drug-inspired lyrics and musical experimentation.The hodge-podge nature in which Capitol repackaged their work for the North American market infuriated the Beatles, as it did Brian Epstein and George Martin, the band's manager and record producer, respectively.The June 1966 LP was unusual in its inclusion of tracks that had yet to be issued in the UK.