“It’s Our Thing” was the first album released by the Isleys on their T-Neck label, named for their adopted home of Teaneck, New Jersey. The leap to 1969 makes for a dramatic and jarring transition, and it marks the beginning of one the greatest runs of creativity and success in pop, rock or rhythm & blues. Nevertheless, there are a few tantalizing performances issued as singles by other labels in the 1964-65 period when young Jimi Hendrix was the Isleys’ guitarist.

The fits, starts and frustrations of their subsequent work for Wand and Motown-which produced “Twist and Shout” and “This Old Heart of Mine” but no other major hits-are not part of this set, which jumps to the spring of 1969 on the second disc. The original trio of O’Kelly, Rudolph and Ronald Isley scored their first hit with the original version of “ Shout!” on RCA-Victor in 1959, but left the label in 1960 after one album and a few singles, all included on the first disc.

How many artists rate a 23 disc box set? In the case of the Isley Brothers, 23 are more than warranted, especially when most are filled out with rare and unreleased tracks from the Brothers’ prime years. Title: The RCA Victor and T-Neck Album Masters, 1959-1983

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