Album Art: Sgt. Pepper's Lonely Hearts Club Band by The BeatlesSgt. Pepper caused a major shift in modern music and helped define the 1967 Summer of Love, but the hard work began in the winter of 66. Including 13 songs, the tracks were recorded in over 400 hours during a 129 day period. The Beatles werent the leaders of the generation, but the spokesmen. McCartney. On a return flight to London in November 1966, Paul conceived the idea for the album. Unable to sleep, he toyed with the idea of creating a new