Having been taught this theory by Dr. Steven E. Gilbert at Fresno State (California) in 1984 through 1988, I used this book extensively for 4 years to build a comprehensive underpinning to my compositional technic beyond what I learned from modal up thru 12 Tone Analysis. A must have book from a very witty, incredibly agile & logial debating speaker, musician and eminent Musicology Professor, writer, critic whom I miss dearly since his death. Along with Allen Forte they both were able to express Shenker's methodolgy where Schenker had not written it down for us. "Forte and Gilbert set out explicitly to fill that gap and their Introduction to Schenkerian Analysis, published in 1983" --1. (below). He also used this thory with his work on the melodies of George Gershwin with his book, The Music of Gershwin (Yale University Press, 1995) - also available here http://www.amazon.com/Music-Gershwin-Composers-Twentieth-Century/dp/0300062338.
1. "He was working on a book that applied his Schenkerian methodology to rock and pop music, based on one of his courses of lectures at California State University, Fresno, where he had taught since 1982. The manuscript may be far enough advanced to allow eventual publication. An interim tombeau appeared from OUP this spring: a collection of essays on Gershwin, with a chapter from Steve Gilbert."
--Martin Anderson
http://www.amazon.com/Gershwin-Style-Looks-Music-George/dp/0195090209
Michael Leary (2012)