Never mind Otis Rush and Buddy Guy -- this is the bedrock document of Chicago's West side blues guitar movement. Ten seminal numbers that constitute Sam's complete Cobra stash (notably "All Your Love," "Easy Baby," and the rockabilly-tinged "21 Days in Jail"), another pair by his harp-blowing uncle Shakey Jake, five numbers from 1960 that first appeared on Mel London's Chief logo (a tortured cover of Fats Domino's "Every Night About This Time" is the killer), and a couple of solid 1966 outings that reinforce Sam's standing as the king of the West side prior to his untimely demise.