What is the link between a 1957 hit and the Beatles’ 1964 track “No Reply”? The answer lends insight into the group’s changing sound and growing lyrical sophistication.

The Beatles’ “Revolution 1” provides no definitive answers, reflecting the turbulent time period from which it emerged.

While “Slow Down” may not rank among the Beatles’ most well-known covers, it does provide a snapshot of the group’s raw early days.

Thematically and musically, “You’re Going to Lose That Girl” signals yet another stage in the Beatles’ artistic development.

“I Want You (She’s So Heavy)” is both the last time all four Beatles were in the studio, and their last breakthrough.

“Please Mister Postman” illustrates how the Beatles adapted other musical forms to create their own sound, both honoring their forebears and adding another dimension.

This King and Goffin track typifies the Beatles’ early era, a time when the band was forming their own identity.

“Devil in Her Heart” exemplifies the early Beatles, representing their eclectic song selection, willingness to take risks and ability to transform a cover.

For the next few columns, Deep Beatles spotlights some of their best covers – beginning with Ringo Starr’s rousing rendition of the Shirelles’ “Boys.”

As politics continues to dominate the news in this U.S. election season, the Beatles’ “Piggies” resonates stronger than ever.