Michael O'Leary is a business giant. He transformed Ryanair from a loss-making joke of an Irish carrier into one of the most valuable airlines in the world, and in the process he has revolutionized the very nature of commercial aviation. In this, the first biography of O'Leary, Alan Ruddock portrays the man in three dimensions and examines the business miracle – often talked about but poorly understood – that O'Leary has wrought.