One of the questions that a new book must answer is the reason for its existence. What gap does it come to fill? The book you are holding aims to contribute to the field of Developmental Psychopathology and aims to serve as an educational manual for students of social and humanities studies. It is a collective work that introduces the reader to the concept of Developmental Psychopathology and emphasizes the most common developmental and psychological problems of childhood and adolescence. Each chapter was created by distinguished scientists with significant academic, clinical, and research experience. The purpose of the book is to provide an introductory, but at the same time contemporary and comprehensive, perspective on the above topics.