The Laws of Charisma: How to Captivate, Inspire, and Influence for Maximum Success by Kurt W. Mortensen (2010)
Breakthrough Networking: Building Relationships That Last by Lillian Bjoresth (2009)
How to Instantly Connect with Anyone: 96 All-New Little Tricks for Big Success in Relationships by Leil Lowndes (2009)
People Styles at Work and Beyond: Making Bad Relationships Good and Good Relationships Better by Robert Bolton and Dorothy Grover Bolton (2009)
The Language of Emotional Intelligence: The Five Essential Tools for Building Powerful and Effective Relationships by Jeanne Segal (2008)
Persuasion IQ: The 10 Skills You Need to Get Exactly What You Want by Kurt W. Mortensen (2008)
Results through Relationships: Building Trust, Performance, and Profit through People by Leil Lowndes (2003)
How to Talk to Anyone: 92 Little Tricks for Big Success in Relationships by Charles C. Manz (2002)
Conversationally Speaking: Tested New Ways to Increase Your Personal and Social Effectiveness by Alan Garner (1997)
How to Win Friends and Influence People by Dale Carnegie (1936)