Herbie Hancock - River, The Joni LettersGreat heroes have always been in the jazz world. Currently, there is no greater, more charismatic jazz pianist on the globe than Herbie Hancock. He's a living legend with a fascinating jazz history, but above all, he's also a contemporary thinking artist who has been breaking down barriers since time immemorial, sparking controversy from time to time among purists. Like his former bandleader Miles Davis, Hancock is a musician who is as controversial