Son of Spirit was the second album that Spirit released through Mercury Records. It was released in October 1975. Unlike Spirit of '76, however, it did not make the national charts. Though some of the album's tracks were from the same sessions that produced Spirit of '76, it also features several Randy California solo demos that have been augmented by a rhythm machine. It was originally reissued on CD in the early 1990s, and it was remastered and reissued (on a CD that also included Farther Along) in 2004 by Beat Goes On.