The book series on Autism Spectrum Disorder continues. In this book, music therapist Britta Seger delves into the theoretical backgrounds of Autism Spectrum Disorder. The specific core symptoms of autism are examined and explained in detail, particularly focusing on communication and social interaction difficulties, which are explored from various angles. Since these aspects pertain to levels of interpersonal contact that are not usually very present in conscious awareness, they can be especially challenging for unaffected individuals to understand and relate to. This book facilitates a deeper understanding of Autism Spectrum Disorder. Throughout the book, illustrative examples are woven in through the fictional character Emil, providing a personal insight into a unique perspective.