For both Alto and Tenor. One Dozen outstanding etudes for the higher-intermediate/advanced player written to sound like real jazz solos, not exercises. All are based on standard chord changes such as blues, I Got Rhythm, Satin Doll, etc..... There are 2 CDs - one with the exercises being played on alto and the other with the exercises played on tenor. This unique feature allows both alto and tenor players to read from the book and have an accompanying demo/play along CD in their key!