The Minibooks Music Reading Series is a unique series of piano sight reading exercises designed to promote sight reading confidence in young beginning piano students. The complete series (40 books) is divided into four sets of 10 books each; Level A RED, Level B BLUE, Level C PURPLE, and Level D GREEN. Level C PURPLE is the third set of four, and introduces new notes (Treble Clef C, B, A, and Bass Clef C, D, E) through patterns and evolving into tunes which introduce rests. For piano teachers and students. minibooksmusic.com