Having a child recently diagnosed with autism, this book is an invaluable resource for anyone in search of the "how to" of a CFGF diet. Containing explanations of why this diet may be effective, tests and nutritional support, lists of foods the child can and cannot eat, recipes, and so much more! I especially appreciated the list of mail order food companies and web sites where you may obtain the food necessary for this diet. Every professional I have spoken with, including those who have seen my child, have highly recommended this book. It has became my salvation! I cannot thank Lisa Lewis enough for writing such a comprehensive book! If you are a parent with a child diagnosed with autism, this book is a must have!