Suggestion is a tool, and it can be used for whatever you like. A knife can be used to stab a man, or to cut the rope that binds his hands - exactly which is the business of the man wielding the knife, not the knife itself. This is an important distinction to make. So, this is a book about how to wield a knife, regardless of what or why you want to cut. However, as communication analysts such as Watzlawick point out, it is impossible not to manipulate.
Interpersonal exchange is predicated on manipulation.
All Hypnosis is Self-Hypnosis Pick up any popular book on hypnosis written between the twenties and the present day, and it is likely you will find this legend confidently emblazoned somewhere within the first few pages. It is, alas, too often done in science to look at isolated parts of a system rather than the whole system - as was done with schizophrenia before the double bind theory came along. Saying that all hypnosis is self hypnosis is akin to saying all massage is self-massage, because it's your skin that's doing the moving around.