Developing Double Stops for Violin by Harvey Whistler is "a complete course of study for double note and chord development," addressing the challenges of learning double-stops in a methodical and effective way. Sections deal with developing double-stops in the various positions, as well as focusing on specific types of double-stops like octaves, thirds, and sixths, and chromatic studies. This book is for violin. Published by Rubank, distributed by Hal Leonard Publications.