Books that have helped me understand neurotypicals:
P.E.T - by Thomas Gordon
Signals - by Alan Pease
The Sourcebook of Magic (A Guidebook to NLP) - by Michael Hall
Probably some others that I can't remember the titles of right now. I don't know any that specifically help with relationships. For all I know, maybe Dr. Phil is your guy? He has written books about relationships.
P.E.T - by Thomas Gordon
Signals - by Alan Pease
The Sourcebook of Magic (A Guidebook to NLP) - by Michael Hall
Probably some others that I can't remember the titles of right now. I don't know any that specifically help with relationships. For all I know, maybe Dr. Phil is your guy? He has written books about relationships.