The 11th revision of the International Classification of Diseases (ICD-11) is now published and all countries of the world will be asked to implement it in practice. The ICD-11 has made significant revisions to the classification of mental health disorders, which have real-world implications for clinical practice. This volume provides a clear overview of the major changes to the main psychiatric classifications that will have an impact on clinicians in their day-to-day practice. Each chapter is authored by an authority in the field, who has also been involved in the revision to the classification. The book also covers disorders that have been newly added to the ICD-11, such as Gaming Disorder, Binge-Eating Disorder, Complex PTSD, Prolonged Grief Disorder and more. This is an essential text for mental health professionals internationally, to help them make sense of the new classification, and how best to put it in to practice.