Book 4 is filled with melodious and challenging studies that are sure to please, while focusing on specific concepts such as voicing melody in chords, tone production, phrase formation with disjoint melody, chord skips, arpeggios, trills, shared melody between hands, chromatic scales, parallel motion scales, melody formation in a complex texture, octave tremolos, etc. Composers included are J.C. Bach, Burgmüller, Gurlitt, Reinhold, Gasparini, Rebikov, Czerny, Streabbog, Schumann, Duvernoy, and more.