http://www.stopbullyingnow.com
I have not read his book, but had it recommended to me by a trusted friend as being very good. It deals with bullying, and offers some understandable steps to take to reduce occurance. There is an addition to the book available online which briefly addresses bullying as it can relate to children with disabilities:
http://www.stopbullyingnow.com/bookadditions.htm#disabilities
Has anyone read this yet?