THE BEATLES IN THE USA: Whether you want to learn the guitar or improve your playing and songwriting, there's no better educational establishment than The Beatles' school of six-stringery.
Not only were the Fabs guitar maniacs who (famously) in their youth travelled all the way across Liverpool to find out how to play B7, but they were also relentless in their quest for new chords, new sounds and new ways of doing things.
All of which is pretty handy for guitarists looking for tips. After all, who better to look at than the most successful guitar band in history?
So, without further ado, here's our rundown of the greatest lessons Beatlemania taught us...