David Thomas works as a company director and consultant. He is a Fellow of the Chartered Management Institute and hold masters and doctoral degrees in management from Sheffield Hallam University and the University of Derby. His research interests are in managerial psychology, narcissistic behaviour, and the philosophy of happiness. He has researched over many years the behaviour of CEOs and senior managers, as well as other office staff and shop floor workers from a variety of walks of life. David is the author of the book 'Narcissism: Behind the Mask'; it was written following his in-depth research into CEOs and company directors, which revealed high levels of narcissistic behaviour in the boardroom, and in the home. It was published in November 2010.