New excellent musicbook by Jamey Aebersold that finally allows all musicians, no matter what musical instrument they play, to practise or improvise all musical compositions from this musicbook. There are four enclosed CDs- first CD: L drums + R bass, excellent for piano practising and for other instruments playing without piano, so called auditory practising, second CD: bass, suitable for percussion practising, piano, guitar and other, third CD: drums, convinient for bass and piano practising, forth CD: L piano, drums and R piano, bass, playing with full accompaniment for all solo musical instruments. This music book offers you a great combination of possibilities, original solutions and 14 songs in post-bebop style. Excellent!!!