Este libro ha sido ampliado (agregando m�s m�sica y explicaciones de t�rminos musicales), actualizado, y editado (con �nfasis en lectura de las notas). [Spanish] The Michael Aaron Piano Course Lesson books have been completely re-engraved, expanded (adding more definitions of musical terms and more musical pieces), updated (with modernized artwork), and re-edited (with less emphasis on fingerings and more on note-reading).