Sweet Baby James (1970). James Taylor's second album, Sweet Baby James, released in early 1970, is the album that secured his spot among the most important songwriters of the 70s. The sweet, bluesy acoustic guitar and vocals on this album are authentic and interesting - this is a record that has everything from a blues inspired jam, packed with a big band horn section ("Steamroller Blues"); to a gospel revival-like track ("Lo And Behold"); to a traditional nursery rhyme made into a folk ballad ("Oh, Susannah"). And, of course, the album featured "Fire and Rain," which reached #3 on the Billboard Hot 100. "Country Road" was another Top 40 hit that struck a chord with music fans, especially because of its attractive mixture of folk, country, gospel, and blues elements, all of them carefully understated and distanced…

This album was unusual on several counts. For starters, it was a soundtrack (for Sam Peckinpah's movie of the same title), a first venture of its kind for Bob Dylan. For another, it was Dylan's first new LP in three years – he hadn't been heard from in any form other than the single "George Jackson," his appearance at the Bangladesh benefit concert in 1971, in all of that time. Finally, it came out at an odd moment of juxtaposition in pop culture history, appearing in July 1973 on the same date as the release of Paul McCartney's own first prominent venture into film music, on the Live and Let Die soundtrack (the Beatles bassist had previously scored The Family Way, a British project overlooked amid the frenzy of the Beatles' success).

Now, here's a star-crossed album. Polydor rejected the first version of it, produced by Glyn Johns, and Eric Clapton was forced to cut it all over again with Tom Dowd. Then, a few dates into a U.S. promotional tour coinciding with its release, Clapton collapsed and was found to be near death from ulcers due to his alcoholism. Finally, it turned out to be the final record of his 15-year association with Polydor, which therefore had no reason to promote it. Nevertheless, the album made the Top Ten, went gold, and spawned a Top Ten single in "I Can't Stand It." And the rest of it wasn't too shabby, either.

Two years after Thick as a Brick 2, an explicit 2012 sequel to the 1972 prog classic, Ian Anderson embarked on another ambitious journey, this time assembling a concept record called Homo Erraticus. A loose – very loose – album based on a "dusty, unpublished manuscript, written by local amateur historian Ernest T. Parritt (1873-1928)," Homo Erraticus is an old-fashioned prog record: it has narrative heft and ideas tied to the '70s, where jazz, classical, folk, orchestral pop, and rock all commingled in a thick, murky soup.

This lush and earthy collaboration between Mark Knopfler and Emmylou Harris may sound like it rose from an amiable weeklong studio session, but the 12 tracks that make up All the Roadrunning were actually recorded over the span of seven years. The boot-stomping "Red Staggerwing" and the gentle "Donkey Town," both of which were bumped from Knopfler's Sailing to Philadelphia record, give the ex-Dire Straits leader a chance to flex his country muscle, while the wistful title track spotlights the lovely Harris, whose playful demeanor and guarded confidence helps keep Knopfler in check during his sometimes excessive soloing. The two couldn't be more at odds vocally, but Knopfler's laconic drawl is like an easy chair for Harris' fluid pipes, and standout tracks like the 9/11-inspired "This Is Goodbye," the wistful "Beachcombing," and the infectious single "This Is Us" come off as effortless statements of vitality from both camps.