Alfred"s Premier Piano Course Jazz Rags & Blues Book 1B includes original pieces that reinforce concepts introduced in the Lesson Book 1B. Popular composer Martha Mier has composed all new music in a variety of styles, including ragtime, boogie, and jazz. Each piece has a duet accompaniment that adds harmonic interest and rhythmic stability. The pieces in the book correlate page by page with the materials in Lesson Book 1B.