This excellent book has 30 challenging etudes in all keys from zero to seven sharps and flats and all the related minor keys, complete with double sharps and double flats. It is challenging in various aspects of agility, accuracy, range and endurance. The title might be slightly deceiving in that this book is not to develop range. The opening section of the book has a series of two octave scales up to G above High C to be done several times in one breath. Range should be considered a prerequisite before attempting this book. The etudes only go to a High F above High C. But, the accomplishment is being able to play each two page etude with perfect accuracy at the metronome markings specified.