Book includes 10 Duets and one play-along CD. The duets are based on blues, rhythm changes and other "standard" chord progressions. The Play-along CD includes 40 play-along tracks. Master trumpeter Mark Olen plays both parts of the duets along with a fantastic rhythm section. Players have a choice of playing the lead part or the second part along with the recording. The Play-along CD also contains extra rhythm section tracks for extended blowing. Book includes a style and analysis section and detailed practice guide for intermediate, advanced and pro-level players.