7(Essential Elements Guitar). Essential Elements for Guitar, Book 2 is a continuation of the concepts and skills taught in Book 1 and includes all of its popular features as well - great songs in a variety of styles, quizzes, music history, music theory, and much more. Concepts taught in Book 2 include: playing melodically in positions up the neck; playing movable chord shapes up the neck; playing scales and extended chords in different keys; more right-hand studies; fingerpicking and pick style; improvisation in positions up the neck; studying different styles through great song selections; and more!