To helping therapists to understand and be able to shift their communication strategies to meet the client on the level of his model of the world. Part 2 reviews the work of Gregory Bateson in this field and presents a model for nonverbal communication. Part 3 enlarges upon the previous two parts and Part 4 is concerned with family therapy. Part 5 contains a formalisation of all the techniques presented in Volumes 1 and 2.