Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An important chapter of American music! A must!

Forget about production wizardry and the big beat, this is raw blues and the roots of rock and roll done by its most legendary figure. Robert Johnson was a god-given talent. He also had big hands, and that made it sound like there were two guitars playing, but amazingly it was just him. Every song is a blues masterpiece. Recorded in only two sessions in 1936-37, it is almost a religious experience to listen to him. Nobody's mentioned the outstanding booket that comes with old photos, dates, lyrics and history about this phenomenal talent. Allegedly poisoned by a jealous man in 1938, only adds to the mystique. Essential! The sound is O.K. with surface noise which only adds character to these amazing recordings.