Recorded in 1970 at Liberty Studios in Los Angeles, this collaborative album between John Lee Hooker and blues rock band Canned Heat arose from a prior friendship. Hooker had previously worked with band members on earlier sessions.
The album blends Hooker's original songs with covers of blues classics, highlighting the chemistry between his deep voice and Alan Wilson's slide guitar. It features long improvisations reflecting a jam session style.
It reached number 73 on the Billboard 200 and was certified gold by the RIAA in 1972. It is considered one of Hooker's best late-career works and a milestone of blues rock.