I recently purchased this book (Kindle version) after watching a tutorial by my violin hero and role model, maestro Itzak Perlman.
What drew me to this book was not only a recommendation by Mr Perlman, but also the wealth of experience presented by the author. Of particular note are the references to correlation (how mind co-ordinates the physical movement of the fingers) and the importance of understanding punctuation, vowels (smooth) and consonents (accented) type notes. The text is also amply illustrated with photographs and notation and these are very welcome indeed.
Overall I consider it money well spent.