My ds9 has always preferred books with illustrations,the more the merrier. He has been id'd at school as VS type, whatever that's worth, I think we *knew* that already, but they have been able to work with him to explain some of his strengths, and areas where things might not come as easily.
Lately just about the only books that appeal to him have to do with greek mythology, it is hard to find anything else to satisfy him.