He received an honours degree in psychology from the University of Hull, an M.A. in clinical psychology from the University of Surrey, and a Ph.D. from University College London under Uta Frith. His books include Aspergers Syndrome: A Guide for Parents and Professionals, which has been translated into 20 languages and provides information on diagnosis, problems of social relations, sensory issues, motor control and other typical issues which face people with Aspergers and their support networks. His other books include The Complete Guide to Aspergers Syndrome, Exploring Feelings for Young Children with High-Functioning Autism or Aspergers Disorder, From Like to Love for Young People with Aspergers Syndrome: Learning How to Express and Enjoy Affection with Family and Friends.