This book does not give an introduction to Schenker's theories but rather I particular way of reading those theories. The analysis held within is Schenkerian rather than Schenker (trust me, there is a massive difference). However, as an introduction to the application of Schenkerian ideas to music outside of the natural rationale of Schenker then this is solid. More importantly it is an important historical document in the dissemination and americanization of Schenker's theories. Worth reading but a deep understanding of the book requires good knowledge of Schenker's own output and how this relates to it.