This is a very scholarly work, in fact it reminded me of a master's thesis or doctoral dissertation revised for popular publication. It is the most thorough and detailed study of Mozart's piano sonatas I have yet found and even so I had hoped for a more complete analysis of how to play the sonatas well. As an adult piano student, I wanted advice as to how to interprent theme, motif and emotion in the various sonatas. This book presents a complete historical perspective on the sonatas but didn't provide the guidance on performance I was hoping for. As part of the library for a serious student, however, it is a must, albeit expensive.