(Essential Elements). Original series (blue cover) The second book in the Essential Elements for Strings series reinforces the techniques learned in Book 1, and also introduces new concepts and develops skills in areas such as dynamics, rhythms, and sight-reading. Features a broad scope, comprehensive detail, great pacing, thorough reinforcement, and much more! | Essential Elements For Strings - Book 2 (original Series) by Robert Gillespie, Paperback | Indigo Chapters