Rosemary Kessick is THE font of knowledge when it comes to gastrointestinal complaints & diet & autism. For years she has helped thousands of parents to help their autistic children - I know, I am one of them and am forever indebted to her, for what she has done for my sons.
Brilliant book, easy to understand, written in plain english. Exactly what is needed to guide parents, carers and professionals through implementing diets for those on the autistic spectrum.
Only 'problem' is you will need to purchase several copies to leave with relations & school/nursery.