Hal Leonard Exercises for Mallet Instruments by Emil Richards

Exercises for Mallet Instruments: Musical Etudes for Vibraphone and Marimba and Other Instruments is a collection of over 500 melodies, scales, and chord-based passages all designed to help you be a better reader by helping you focus on chordal relationships and similar musical ideas. Almost no text is presented (with the exception of a forward), letting you get right down to the nitty-gritty. This book will change your brain.