The John W. Schaum Piano Course The Purple Book C is a vintage collection of classical piano music published by Belwin Inc in 1945. Designed for piano enthusiasts looking to delve into the world of classical music, this paperback book provides a curated selection of songs and exercises suitable for practice and performance. With a focus on classical genre and a straightforward format, this book offers pianists in the United States a valuable resource for honing their skills and exploring the beauty of classical piano repertoire.