This ground-breaking book provides the first detailed clinical analysis of the various manifestations of catatonia, shutdown and breakdown in autistic individuals, with a new assessment framework (ACE-S) and guidance on intervention and management strategies using a psycho-ecological approach. Based on Dr Amitta Shah\'s lifetime of clinical experience in Autism Spectrum Disorders, and her research in collaboration with Dr Lorna Wing, this much needed book will be a valuable resource for professionals, autistic individuals and their families and carers.