John Coltrane in 1958 was unnerving.

If you were a tenor saxophonist back then, Coltrane’s playing in clubs and on albums must have been gripping and daunting. A year earlier, Coltrane was largely a sideman on recordings, notably with pianists Thelonious Monk, Red Garland, Sonny Clark and Tadd Dameron, as well as with a batch of trumpeters. There were two major leadership dates where Coltrane began to show his prowess and promise — Coltrane and Blue Train. But 1958 was a different bag. That year, it was as if Coltrane had developed a passing gear no one else had or even knew existed. His ribbons of improvised ideas, sheets of sound and wide-bodied ballads left most musicians in awe.