Unfortunately these tend to be fraught with unacceptable side effects or inconvenience, and nothing along this line has yet proved effective as a long term treatment. When you undertake good treatment for stuttering you have to be active, not passive. You have to put the treatment into practice yourself, getting your brain to do things it finds hard. It isn't something that someone or something does to you. It is this sort of treatment that this book presumes you've tackled.
Good treatment means first learning a skill.
Referring back to the analogy of driving on ice, good treatment teaches you how to become a reliable driver despite the unfavourable conditions. The exact technique that you learn varies with the treatment program that you enter, but skill in dealing with your inefficient speech control system is the important first step. Whatever technique you learn, it's also important that it's one which allows good, natural sounding speech when you've mastered it. Singing is usually a quick way to produce fluency but it isn't any use as a treatment unless you want to go around sounding like a Gilbert and Sullivan operetta. If you don't like the way you sound after therapy you're unlikely to get any lasting benefit.