John Adair is a?leading authority on leadership and leadership development.? He advises many organizations in business, government, education, health and the voluntary sector.? Over a million managers worldwide have taken part in the Action-Centred Leadership programs he pioneered. Adair is the author of over 50 books, including the leadership classic "Not Bosses But Leaders, " (Kogan Page), and he continues to write and teach throughout the world.