Book 4 spotlights nine sonatinas from both the Classical and Romantic periods with works by Beethoven, Benda, Dussek, Reinecke, Biehl, Lynes, Köhler, Kuhlau, and Lichner. Every sonatina is in its original, complete form in this 84-page book. Each volume contains interesting historical information, a thematic index, a music dictionary, and information About the Pieces and Composers" that can be used in program notes."