Book 4 of this series continues with four duets in jazz, rags, and blues styles. The duets are slightly longer than the duets in books 1 through 3, creating a satisfying performance experience for advancing students. "These duets would be a great addition to any recital or performance experience is excellent for sight reading at a lesson with the teacher; or used to provide personal pleasure as the music is shared with the duet partner." Jean Ritter, Progressions