By Martha Mier. Keyboard. Level: Early Intermediate (3). Published by Alfred Publishing. The magic of Martha Mier's Jazz, Rags and Blues is back in her newest series!Jazz, Rags and Blues for Two. Book 1 features all-new music in the form of six duets for early-intermediate pianists. Syncopated rhythms, colorful sounds and rich harmonies are highlighted in the variety of styles found in this collection.