“Few studio experiences I’ve had can compare with the thrill of listening to the original master tapes—mono, stereo and alternate takes—of Blue Train,” says Harley. “I consider these two new versions the definitive editions of this masterpiece performance by John Coltrane.” Blue Train came at a pivotal moment in Coltrane’s career. Earlier in 1957, the saxophonist had hit bottom when his heroin addiction caused him to be fired from the Miles Davis Quintet. But after kicking his habit, Coltrane returned with a fervor inspired by an extended summer residency with Thelonious Monk at the Five Spot Café. By the end of the year, Coltrane had been rehired by Davis and had produced his first masterwork, an album that even he was deeply proud of. As Kahn recounts in his essay: “Blue Train was a recording that Coltrane, ever self-critical and modest, held in high regard.