This ground-breaking book provides a unified explanation of autism. Autism B Theory: The Cause and Development of Autism details the likely cause of autism that explains how the autistic brain develops in relation to: Sensory sensitivities Sensory motor development Emotions Social skills and understanding others Focused and isolated attention Perception Problem solving ability and flexibility Mental health and trauma The book also explains the wider phenomena associated with the autistic spectrum such as the microbiome and gut health, autoimmune challenges, synaesthesia, facial blindness, alexithymia, stimming, LGBTQ preferences, Pathological Demand Avoidance (PDA), perceived higher prevalence of males, higher prevalence of autism if conceived in the winter months and various others. Autism B Theory highlights significant supports that autistic people can implement themselves, as well as supports that family members, carers and professionals can use to support autistic and neurodivergent people with to promote better opportunities. It is a must have for anyone interested in understanding or supporting autism.