Although it is really for Jr. High and High School kids with AS, the book A 5 is agains the law may be helpful in helping you to explain what is acceptable and what is not. I found it useful for my son. Some of the things about interacting with the opposite sex, he is not ready for, but the information on aggression was really useful.
http://www.amazon.com/Against-Law-Socia ... 1931282358