Anything by Tony Attwood is good, and you could also look at the OASIS web site. To be honest, I haven't kept up on the literature since my child is considerably older. I do belong to an excellent list serve for parents of kids who are both gifted and challenged by nvld or as. Please ask me about it if you get a diagnosis.

As Debbie suggests above, your child may only be exhibiting SID issues, but it may be a good idea to read up on the autism spectrum just in case.

good luck-