I saw a lot of my son in the main character of the book. In the book, the teenaged boy felt safe when his mum or dad put their palm up so he could touch their palm with his own (that was like a hug for him). My son doesn't have that severe an aversion, either, but he has his own kind of hug to make him feel safe.............
he touches stomachs with me or his dad. It gets looks if we do it in public because of it's oddity, but it makes Tyler feel loved and cared for. He'll hug normally, but he doesn't get the same thing out of it. He hugs robotically.
Tyler also takes things literally, so feelings, ideas, theories, and any other stuff that belongs in the abstract kind of goes out the window. He also has a difficult time calming himself down once truly upset. He has a tendency to throw himself on the ground and hit his head until someone physically holds him to get him to stop (he'll also scratch his face until he bleeds until someone physically stops him).
But just like the boy in the story, Tyler responds to many visual cues. This can be used to everyone's advantage, too: we learned how to keep him focused on tasks and social behavior by having "stories" presented to him in a cartoon/visual format that directs him what to do. He'll carry it with him if we are going to the store together, and if he starts getting sidetracked with all the visual stimuli around him, I'll have him go back to his "storyboard" to remind him of where we are in our errand.
We use these storyboards to keep him focused on getting ready for school, for sitting down at the dinner table, for running errands, and for getting ready for bed at night. We also have a "safe" story for his temper tantrums that help him focus on keeping his body safe from himself.
Since he loves the feeling of security when focusing on one thing at a time, he loves job lists. This is where he excels since he doesn't have the nerve to protest like the other kids when he sees a "to-do" list in front of him.
Peace,
Mystic