The author of the book “How Do You Behave or 10 Steps to Changing Difficult Behavior” L. Petranovskaya is a family psychologist, a specialist in family structure, and a laureate of the Presidential Prize of the Russian Federation in the field of education. The book reveals the mechanisms of difficult behavior of adopted children and gives specific recommendations for changing it. The second edition of the book is supplemented by a new chapter, which deals with typical questions that arise for adoptive parents: what to do if a child is lying, if he refuses to go to school, how to cope with children's fears, etc. The manual is intended primarily for adoptive parents, but it will also be interesting for all parents who are faced with difficulties in the behavior of their children, for psychologists and specialists in working with children, as well as for students of pedagogical and psychological faculties.