Thanks, I will check into Yapko´s work.

But I was locking for some thoughts about what is really necessary for working therapeutically with hypnotherapy.
If we imagine a person who don't know anything about psychology or any kind of psychotherapy, and only reads a lot of books on Ericksonian approches. Would that person be able to do good therapy? Probably not. And my question is which those basic knowledges are that is needed for doing effective hypnotherapy?

Sorry for my bad english.

/ Kristoffer