The Secret Of Technique Preservation, by Ernest S. Williams; previosly published under the title Lip Building Excercises. Long considered by students, professionals and teachers as one of the most consise and invaluble compact excercise books covering a series of daily routines designed to maintain a consistant level of technical ability. The great value of this book can be judged, for example, by the number of authors who have used it and amplified on it to create their own excercise books.