Spiral is a composition by John Coltrane, recorded during the sessions for his 1959 album Giant Steps on Atlantic Records. The tune is an original composition rather than a contrafact, featuring its own distinctive melody and harmonic progression. Among the Giant Steps tracks, Spiral occupies a middle ground between the album's most harmonically radical pieces and its more lyrical ballads, presenting a winding, searching melodic line that suits its evocative title. The harmony moves through shifting tonal centers with a restless quality that reflects Coltrane's interest in extended harmonic motion during this period, though the changes here are not built on the same three-tonic substitution system that defines Giant Steps and Countdown. The original recording features Tommy Flanagan on piano, Paul Chambers on acoustic bass, and Art Taylor on drums, with Coltrane's tenor saxophone solo demonstrating his sheets of sound approach as he works through the composition's harmonic landscape. The tune is less frequently performed than the album's title track or Naima, but it holds a respected place in Coltrane's catalog as an example of his more exploratory compositional voice. It appears in jazz real books and transcription collections, and it continues to attract study from musicians interested in the full scope of Coltrane's writing during his most creatively productive period at Atlantic Records.