if you are interested in reading more about children with autism like Dibs, other great authors and play therapy based books that are required reading in some colleges are Mary Macracken Torey Hayden and Josh greenfield.

Mary Macracken and Torey Hayden both wrote a whole series of books that followed the same children some of which had autism, schizophrenia and other mental disorders ) through their educational and therapy issues with them.

Josh Greenfiald wrote a book series about his autistic son.

keep in mind that these books were published in the 1960's 70's and 80's. Some of whats in these books and how play therapy is done back then vs now have changed as mental health rules and standards have changed over the years.