The Real Books are the best-selling jazz books of all time. Since the 1970s, musicians have trusted these volumes to get them through every gig, night after night. The price of this book includes online audio access containing backing tracks for 240 songs, which are available for download or streaming. Play along with a real rhythm, professionally recorded for these songs. NOW INCLUDING Playback+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, pan left or right.