This book has very high reviews on Amazon and I have found it to be very helpful. I wish I had read it a long time ago.
It's called "In Sheep's Clothing" Understanding and Dealing with Manipulative People by George Simon, Jr.
I think it's got a lot of great insight on understanding difficult people.
I'm going to check i out
Me too...Thank You!!! :D
Keysgirl, I'm reading this now. would be interested in knowing what was most useful to you in the book.