Sometimes, a greatest-hits set is timed perfectly to gather together a group's most successful and familiar performances just at the point when that group has passed the point of their maximum exposure to the public, but before the public memory has had a chance to fade. That was the case when Columbia Records assembled this compilation for release in early 1972. At that point, Blood, Sweat & Tears had released four albums and scored six Top 40 hits, each of which is heard here. But lead singer David Clayton-Thomas had just quit the group, so that the unit that recorded songs like "You've Made Me So Very Happy" was not working together anymore. And even when Clayton-Thomas returned, the band would continue to decline commercially. As such, BS&T's Greatest Hits captures the band's peak in 11 selections–seven singles chart entries, plus two album tracks from the celebrated debut album when Al Kooper helmed the group, and two more from the Grammy-winning multi-platinum second album.

Recorded in Japan in July 1973, this massive, three-LP live album was available outside the United States in 1974 but held back from domestic release in the U.S. It features the same "New Santana Band" that recorded Welcome, and combines that group's jazz and spiritual influences with performances of earlier Latin rock favorites like "Oye Como Va."

Following the success of their highly regarded self-titled debut, the original supergroup made up of four members of different '70s progressive rock bands, including lead vocalist and bassist John Wetton of King Crimson, guitarist Steve Howe of Yes, keyboardist Geoff Downes of Yes and The Buggles, and drummer Carl Palmer of Emerson, Lake & Palmer released Alpha. The album was certified platinum in the US and silver in Britain by the BPI and eventually sold over two million copies. Released in 1983, one year before the departure of guitarist Steve Howe, this would be the last album with the band's original line-up.Alpha focused more on mainstream pop/rock sounds, and is less characterized by progressive rock elements than its predecessor. The album reached #6 on the Billboard album chart and Top Five in the UK Albums Chart. The lead single, "Don't Cry," was a Top 10 hit on the Billboard Hot 100 and returned the band to #1 on the Hot Mainstream Rock Tracks charts.

Who Do We Think We Are is the seventh studio album by the British band Deep Purple, released in 1973. It was Deep Purple's last album with singer Ian Gillan and bassist Roger Glover until Perfect Strangers came out in 1984…

Songs in the Key of Life was Stevie Wonder's longest, most ambitious collection of songs, a two-LP (plus accompanying EP) set that – just as the title promised – touched on nearly every issue under the sun, and did it all with ambitious (even for him), wide-ranging arrangements and some of the best performances of Wonder's career…

Simon & Garfunkel's second album, Sounds of Silence, was recorded 18 months after their debut long-player, Wednesday Morning, 3 AM – but even though the two albums shared one song (actually, one-and-a-half songs) in common, the sound here seemed a million miles away from the gentle harmonizing and unassuming acoustic accompaniment on the first record…

Following the same formula as her early records, Heart Like a Wheel doesn't appear to be a great breakthrough on the surface. However, Ronstadt comes into her own on this mix of oldies and contemporary classics…

One Man Dog drastically lowered expectations for a new James Taylor album, and those expectations were almost met by Walking Man, a more considered effort than its predecessor that managed to be just as trivial but even less interesting…

Drummer Billy Cobham was fresh from his success with the Mahavishnu Orchestra when he recorded his debut album, which is still his best. Most of the selections showcase Cobham in a quartet with keyboardist Jan Hammer, guitarist Tommy Bolin, and electric bassist Lee Sklar. Two other numbers include Joe Farrell on flute and soprano and trumpeter Jimmy Owens with guitarist John Tropea, Hammer, bassist Ron Carter, and Ray Barretto on congas. The generally high-quality compositions (which include "Red Baron") make this fusion set a standout, a strong mixture of rock-ish rhythms and jazz improvising.

Simon & Garfunkel's first masterpiece, Parsley, Sage, Rosemary and Thyme was also the first album on which the duo, in tandem with engineer Roy Halee, exerted total control from beginning to end, right down to the mixing, and it is an achievement akin to the Beatles' Revolver or the Beach Boys' Pet Sounds album, and just as personal and pointed as either of those records at their respective bests…

Led Zeppelin's fourth album, Black Sabbath's Paranoid, and Deep Purple's Machine Head have stood the test of time as the Holy Trinity of English hard rock and heavy metal, serving as the fundamental blueprints followed by virtually every heavy rock & roll band since the early '70s…

After releasing two "head" records during 1970-71, Stevie Wonder expanded his compositional palette with 1972's Talking Book to include societal ills as well as tender love songs, and so recorded the first smash album of his career…

On this, the second Spirit album, the group put all of the elements together that made them the legendary (and underrated) band that they were. Jazz, rock & roll, and even classical elements combined to create one of the cleanest, most tasteful syntheses of its day. The group had also improved measurably from their fine debut album, especially in the area of vocals. The album's hit single, "I Got a Line on You," boasts especially strong harmonies as well as one of the greatest rock riffs of the period. The first side of this record is a wonderful and seamless suite, and taken in its entirety, one of the greatest sides on Los Angeles rock. The CD reissue also boasts some excellent bonus tracks. "So Little to Say" is one of Jay Ferguson's finest compositions ever, and the jazz-inspired instrumentals such as "Fog" and "Space Chile" showcase pianist John Locke as one of the most inspired and lyrical players in the rock idiom to date. All in all, a classic album and a true landmark.

Spirit's 1968 debut album spent more than six months on the Billboard album charts and received heavy airplay on underground FM radio. Their music was part of the core, essence, and heartbeat of the the hippie, psychedelic, counter culture movement. The album is timeless, as fresh today as when it first appeared. The band could play more styles than almost any other group. On Spirit they unveiled a mélange of rock, jazz, blues, folk-rock, and even a bit of classical and Indian music. The music is experimental. The vocals flow as easily as the instrumentals. Spirit struck a careful balance between disciplined studio chops, jazz improvisation, and driving rock and roll. Guitar prodigy Randy California is a clear standout, but the other band members are superb as well; John Locke's shimmering keyboards, Mark Andes' subsonic wall of bass, and Ed Cassidy's precision drumming. Big credit has to go to lead singer Jay Fergusson, whose phrasing is always just right with a wonderful spontaneous feel. The Marty Paich string arrangements are sublime.

With Tom Johnston gone from the lineup because of health problems, this is where the "new" Doobie Brothers really make their debut, with a richly soulful sound throughout and emphasis on horns and Michael McDonald's piano more than on Patrick Simmons' or Jeff Baxter's guitars…