Summary: The Beatles' last days as a band were as productive as any major pop phenomenon that was about to split. After recording the ragged-but-right Let It Be, the group held on for this ambitious effort, an album that was to become their best-selling. Though all four contribute to the first side's writing, John Lennon's hard-rocking, "Come Together" and "I Want You (She's So Heavy)" make the strongest impression. A series of song fragments edited together in suite form dominates side two; its portentous, touching, official close ("Golden Slumbers"/"Carry That Weight"/"The End") is nicely undercut, in typical Beatles fashion, by Paul McCartney's cheeky "Her Majesty," which follows. --Rickey Wright

Summary: Better known as the "White Album," this was meant to be the record that brought them back to earth after three years of studio experimentation. Instead, it took them all over the place, continuing to burst the envelope of pop music. Lennon and McCartney were still at the height of their powers, with Lennon in particular growing into one of rock's towering figures. But even McCartney could still rock, and the amazement on "Helter Skelter" was that he had vocal cords at the end. From Beach Boys knock-offs to reggae and to the unknown ("Revolution #9"), this has it all. Some records have legend written all over them; this is one. --Chris Nickson

Summary: Before Sgt. Pepper, no one seriously thought of rock music as actual art. That all changed in 1967, though, when John, Paul, George and Ringo (with "A Little Help" from their friend, producer George Martin) created an undeniable work of art which remains, after 30-plus years, one of the most influential albums of all time. From Lennon's evocative word/sound pictures (the trippy "Lucy in the Sky With Diamonds," the carnival-like "Being for the Benefit of Mr. Kite") and McCartney's music hall-styled "When I'm 64," to Harrison's Eastern-leaning "Within You Without You," and the avant-garde mini-suite, "A Day in the Life," Sgt. Pepper was a milestone for both '60s music and popular culture. --Billy Altman