The National Autistic Society estimates that Autism Spectrum Disorder (ASD) now affects 500,000 families in the UK alone, while one in 86 children have an ASD-related special educational need. This one-stop reference guide introduces the reader to an understanding of this complex disorder, touching on all aspects related to ASD (including Asperger's syndrome), with a detailed resource section for those wanting more in-depth information on specific areas. With chapters on the causes of ASD, diagnosis, treatment and diet, this guide provides practical information in a clear and concise manner.