The Beatles are universally regarded as one of the most important bands in the history of Rock and Roll. Over the course of an active career that spanned just 10 years, the band released some of the most enduring popular music of the 20th century – a catalog whose influence would be hard to overstate. To give but one measure of the band’s stature, when Rolling Stone ranked the “500 Greatest Albums Of All Time,” four Beatles records made the top ten: Revolver, Rubber Soul, The Beatles (a.k.a. the “White Album”) and Sgt. Pepper’s Lonely Hearts Club Band, which...