This book is a comprehensive coverage of mental disorders common in children and adolescents. It contains 43 chapters which cover mental illnesses such as anxiety disorders, obsessive compulsive disorder, bipolar disorder, attention deficit hyperactivity disorder and dissociative disorders. Special emphasis is on problems of suicide, depression, and substance use disorders. The neuropathology and neuroimaging studies have been included to identify the etiopathogenesis and appropriate therapies for the disorders. Psychedelic therapy, telepsychiatry, and neuromodulation are highlighted in the book. The book is useful for undergraduate and postgraduate medical students of paediatrics, medicine, and psychiatry, medical teachers and medical professionals as well as clinical psychologists who provide counselling and behavioural therapy to children and adolescents.