Tor Wennerberg is a licenced clinical psychologist in Stockholm, Sweden and Certified Trainer of the Coherence Psychology Institute. He is the author of two books on attachment theory and differentiation theory, published in 2010 and 2013 respectively. Both are widely used in psychotherapy trainings throughout Sweden. A chapter in his most recent book introduced Coherence Therapy for a Swedish professional audience. He is also a regular contributor to the Journal of the Swedish Psychological Association.