Martin Manser's books on management skills have sold over 100,000 copies, and he is a well-respected tutor at the London College of Communication. Nigel Cumberland has delivered management training for organizations based on five different continents. An experienced manager himself, he has been a regional Finance Director with a FTSE 100 company, and has run his own award-winning executive search firm. Dr Norma Barry has four decades experience in managerial roles for a wide variety of businesses and organizations. She has a PhD in Leadership and Change Management, and an MBA from Cardiff Business School. Geoff Ribbens and Richard Thompson (Cornwall, England) are well-known experts in body language, and authors of several successful books on the subject. They coach people on how to apply and understand body language in a diverse range of business settings.