Freaks, Geeks & Asperger Syndrome: A User Guide to Adolescence is a book by Luke Jackson, a 13-year-old boy with Asperger syndrome. The book is a serious but light-hearted look at the challenges and joys of living on the autism spectrum. The thirteen-year-old writer has three brothers and three sisters. One of his brothers also has AD/HD and one is autistic. He has also written two other books, A User Guide to Gf/CF Diet, and Asperger Syndrome and AD/HD.