I've read a good book in hypnosis and I can say it's not as bad as one would think it is. Actually hypnosis or trance is something we go into and come out of every day. If you'd like to read a good book on the subject get the book called Monsters and Magical Sticks: There's no such thing as hypnosis. The guy who wrote it was a wizard at it and was able to treat many people successfully. Otherwise hypnosis is mostly harmless, and you can't be hypnotized into doing something out of your will. Meaning if you don't agree with what's being done you won't be hypnotized into doing it. Good luck with your session!