When The Beatles returned to Abbey Road to record their sixth album, they were exhausted from constant touring and releasing at a pace of two albums a year. They also had virtually no songs prepared. But when it was completed, their sixth album was Rubber Soul, arguably the first actual album, not just a collection of songs. This was the turning point; it’s the album that bridges the British Invasion Beatles to Revolver and Sgt. Pepper. It’s the album that turned the music world on its rear, forcing the band’s rivals and contemporaries like the Beach Boys and Rolling Stones to step up their games.  In essence, with Rubber Soul, the Beatles were just getting started.