(Willis). A Dozen a Day books have long been the favorite pre-practice technical exercises for young pianists. Now these classic warm-up exercises are available for instruments too! Complete with audio backing tracks on the included CD, these books help develop and maintain good fingering and breathing technique the basis for all good playing. Suddenly practice has become more rewarding... and a lot more enjoyable! | A Dozen A Day - Violin by Hal Leonard Corp., Book & Toy | Indigo Chapters