This is by far the best book I have read on being successful with relationships. I know this is a huge claim; however, the results do not lie. One of my mentors gave me a copy and I have read it more than a half dozen times to ensure I am practicing the timeless principles to win in my daily interactions with individuals. I continue to experience great relationship success. I highly recommend this book if you want to be successful with people across all areas of life.
How to Win Friends and Influence People (Pocket Books, October 1, 1998)