In book 4 you will find: 6/8 rhythms, simple counterpoint, swing rhythms, key of F major, more complex arpeggios, harmonics, higher positions on the bass strings, rasgueados, South American rhythms, Blues in A major...... and lots of great pieces, including Sounds Irish, Greensleeves, Shout it out! Cavatina, Prelude (At the villa), Heart of Spain, El Noy de la Mare, Mamba, Twelve Bar Blues, Reflections.