Peter Bourquin Originally from Germany, he has lived near Barcelona since 1998. Founder and co-director of the institute ECOS - School of Systemic Constellation. Writer and humanist approach therapist. Trained in Family Constellations, Gestalt Therapy, Brainspotting and Integrative Psychotherapy with Richard Erskine. Since 2001 he has provided training in family constellations performed in various Spanish cities. He assists in the training and supervision of professionals with various therapeutic institutes in Spain and Latin America. He is a didactic member of the German and Spanish associations (DGfS and AEBH). He has authored two more books, FAMILY CONSTELLATIONS (2007) and THE ART OF THERAPY (2011), both published by the Editorial Desclée de Brouwer, Bilbao, Spain as well as numerous articles. His books and articles are published in Spanish, Portuguese, German and English. Carmen Cortés Berenguer Co-director and teacher of the ECOS teaching institute - School of Systemic Constellations. Professional Family and Systemic Constellations expert by the Royal University Centre Maria Cristina. Trained in various humanistic therapeutic approaches: Gestalt therapy; Integrative Psychotherapy with Richard Erskine; Brainspotting; SAT program of integrative psychotherapy and Enneagram with Claudio Naranjo; ' Energy Centers Gym'. Teaches workshops on Family Constellations and assists in the training and supervision of professionals with various therapeutic institutes in Spain and Latin America.