Dr Cooper is a leading doctor on the care and prevention of throat pathologies. This book, however, pathologizes the color and variety of voices that frankly make listening a wonderful surprise. Good on him for helping the afflicted, but Tuva singers and people who explore the range of their voice are not hurting themselves at all. The book does a great service in focusing on the balanced approach to sound production, with exercises to enable us to "find" our voice--the natural pitch level for the most sound with the least effort, coupled with the optimal resonant tone or buzz from the nose-mouth "mask" of the face. ( )