Hi Martin,
Thanks for the question.
A suggestion and a couple more questions:
I'm taking a bit of a risk here because I'm going to recommnd something I have't seen! (although I'm now going to buy them myself to check them out). For learning hypnotic language by reputation I'd recommend Jamie Smart's influence and hypnosis cards:
NLP Experts - Books - NLP - Recommended
However I also think its also worth going through the proccess of how to create your own patterns. However to do this I need a specific context.
So if you're interested in persuing this would you suggest (purely for illustration) a business context your potential client is in and what you would like to achieve through using hypnotic language.