I am trying to find books and information on passive aggressive, I am
sure my friend has this problem emotionally.  Is there any experts in
the field and what are the best books to purchase to understand how to
help with the cure or therapy

Who wants to know?
:-)

Check out this book.

http://health-books-online.net/0671870742.html
LIVING WITH THE PASSIVE-AGGRESSIVE MAN

~ czh ~

Thanks for the suggestion, I ordered the book.

To answer the other question, I am just a woman who loves a man who needs help.

A person who engages in passive aggression *can* change their
behavior; however, as with most things psychological, such behavior
changes **only** come when the person in question becomes motivated to
change their own behavior.

However, there are a number of ways to respond to passive-aggressive
behavior that can turn the tables and deny the practitioner the
satisfaction or "payoff" that they are seeking by such manipulative
behavior -- thus making the behavior a "losing strategy" for them, and
therefore less desirable for them to practice.

The book czh suggested should be a big help with this. Here are a
couple of online resources you may find useful:

The Passive-Aggressive Helping Hand -- How and Why?
http://www.passiveaggressive.homestead.com/HOWandWhy.html

"Oh, That Hurts!" by Ed Pavelka, Prevention Magazine (June 10, 1998)
http://web.archive.org/web/20030403211831/http://www.itsallaboutprevention.com/archive/980601-003.html

Best wishes,

aceresearcher

Thanks so much for this comment it was very helpful.  Why do people
become like this, is it all from their upbringing and parents or what
do you think?  If you want to answer another question.

Thanks debjenmad