The album featured two singles, "Gypsy Man" (severely truncated from the 11 minute album version) backed with "Deliver the Word" (US #8), and "Me and Baby Brother" backed with "In Your Eyes" (US #15). A live version of "Me and Baby Brother" had been released previously on All Day Music (1971). The title "H₂Overture" is a pun on H₂O, the chemical formula for water.

A 4-channel surround sound (quadraphonic) mix was also released for the album in the 8-track tape format (United Artists UA-DA128-H), featuring a different track order, a reprise of "H₂Overture" with early fade-out, and an early fade-out of "Gypsy Man".

The cover was printed using metallic silver ink on black, and the cover is textured, resembling black leather as used for the covers of Bibles (the album title being a phrase associated with the Bible). A die-cut window in the lower left corner reveals part of the innersleeve which shows a human figure walking along a deserted beach with his head bowed. The other side of the innersleeve shows the same picture, but mirror reversed, and tinted blue instead of orange. When the cover is inserted the other way around, the window reveals an empty beach with sunlight (which, in blue, looks like moonlight) reflecting off the water. The album design and photo is credited to Gary Sato, with Lee Oskar credited for cover concept.

All tracks composed by War (Papa Dee Allen, Harold Brown, B.B. Dickerson, Lonnie Jordan, Charles Miller, Lee Oskar, Howard E. Scott), except where indicated.

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