Anne4, my DD10 has the exact same VCI and PRI scores. We are still working to find the right acceleration for her with her school (and in the meantime are working with ALEKS and Life of Fred afterschool). Definitely apply for DYS.

For reading, just for fun stuff, has your son tried Captain Underpants, Black Lagoon, Diary of a Wimpy Kid, Guardians of Ga'hoole, or The Invention of Hugo Cabret?