David Heyes . These exercise cover many aspects of double bass technique, from left-hand shape and shifting, to thumb position, double stops and scales. Each exercise can be adapted for various standards and could be used as the basis for technical development alongside the usual scales/arpeggios and studies. Most exercises include a variety of fingering and bowing suggestions, and the book was compiled to help create a strong technique throughout the working range of the double bass. Each exercise includes a detailed description about its aims and objectives.. Performance Level: 4;5;6;7;8;Advanced.. Grade: 4 - Advanced