In 1993 the authors published The Art of Change: Strategic Therapy and Hypnotherapy Without Trance, a revolutionary work that introduced a series of effective clinical strategies to create therapeutic change, even in seemingly impossible cases. In his new book, the author performs another quantum leap, leading his readers to a more operative knowledge of the precise logic of therapeutic change. Most intimidating mental disorders are based on perceptions of reality that when using an ordinary 'common-sense' logic as our reading lens, look as if they are irrational, bizarre, illogical and therefore hard to understand and manage.