Mel Bay has published a book I authored, entitled "Introducing Extended Saxophone Techniques". From the Preface of "Introducing Extended Saxophone Techniques" "The saxophone, like all wind instruments, is inspired and influenced by the human voice. As such, there lies an enormous potential for the production of sound, and a great responsibility falls upon the instrumentalist [...]--authored by Curtis Macdonald, saxophonist and composer based in Brooklyn, NY.http://curtismacdonald.com/