The Soul Children took over vocal chores from Sam & Dave after the latter duo had left Stax. Peter Guralnick, in his excellent book Sweet Soul Music (Virgin p/b), described them as "Sweet harmonies and church wrecking emotion" and who could disagree with such a perfect description. Friction/Best of Two Worlds (originally released in 1974 and 71, respectively) is a double soul treat on one value-for-money CD. "An' if you don't know what we mean" (as they'd say back when) "then, you got a hole in yo' soul!"