People with autism often are intolerant of gluten (a protein in four types of cereal) and casein (a protein found in animal milk). There are many testaments to the benefits for such people of a diet that excludes gluten, casein, monosodium glutamate and aspartame, and these persuaded Marilyn Le Breton to put her autistic son Jack on the diet. This is the book that Marilyn wishes had been available to her when she first did so. In it she explains what the diet is all about and how it works, what...