With a doctorate in five woodwind instruments and decades as both a performer and a teacher, Dr. Mark Watkins has long been interested in the production of sound. What differentiates his book From the Inside Out: An In-depth Resource for the Development of Saxophone Sound from other music reference texts is its focus on fluoroscopy and endoscopy to supersede supposition and speculation. No other book provides both video and hard-copy illustrations of the inner workings of the saxophonist's vocal tract. Since 1995, Watkins has conducted X-ray and probe camera experiments and consulted with music acoustics physicists from around the world. Now, Watkins shares what he has learned in From the Inside Out, which is filled with explanations and exercises for saxophone performers and teachers in areas including range, relations to vocal mechanisms, articulation, jazz, anatomy, the science of the vocal tract, and extended techniques.