It's A Sin To Be Rich (1972)

"This recording brings to life "lost" sessions recorded spontaneously over a few hours in a L.A. studio in 1972. It's loose, shambolic, and thoroughly authentic. You can all but smell the stale smoke hovering in the air. Hopkins' guitar moans lazily as he banters with buddy John Lee Hooker, then spits out some surprisingly biting slide work. A historic document of the genre." (Allmusic)