Machers and Rockers: Chess Records and the Business of Rock & RollA tour de force history of Jews, blues, and the birth of a new industry. On the south side of Chicago in the late 1940s, two immigrants, one a Jew born in Russia, the other a black blues singer from Mississippi met and changed the course of musical history. Muddy Waters electrified the blues, and Leonard Chess recorded it. Soon Bo Diddly and Chuck Berry added a dose of pulsating rhythm, and Chess Records captured that, too. Rock & roll had arrived,