Addressing the full spectrum of theoretical output associated with autism and Asperger syndrome, this is the complete guide to autism theory - spanning from mainstream and alternative, through to non-autism specific theories that might be applied to autism. Previous study on autism has made significant inroads into the individual branches of autism theory, however, no text has brought together the complete range of theories in an accessible textbook for students and academics. The author argues that a more obvious application of theory to autism intervention would be beneficial to practitioners. With access to the complete range of available autism and Asperger syndrome theory, from development theories to learning style theories, the academics and students working towards the practical application of theory to intervention will have all the necessary information at their disposal. The book is based on a series of autism theory lectures delivered for the NAS and Sheffield Hallam University.