Actually, both of those books, especially the first one, are full of inappropriate stereotypes (such as visual learners, sensory dysfunction, literal thinking). These ideas may be especially inappropriate to understanding the 2E autistic, who may or many not have any of the traits listed. This is not an idle concern: we have found that people's reliance on these stereotypes makes it hard to get our child's needs met.

I would instead recommend The Oasis Guide to Asperger Syndrome and Parenting Your Asperger Child. They're much more nuanced.