McKinsey & Company is one of the world's leading management consulting firms. It remapped the White House's power structure, revolutionized business schools, and introduced budgeting as a management tool. Its consultants have created the corporate behaviors that shaped our world. However, the firm is also associated with some major failures,including General Motors and Enron. Yet they are rarely blamed for the failuresat least not publicly. Financial journalist Duff McDonald uncovers how these high-powered business savants have ushered in waves of structural, financial, and technological shifts to the biggest and best American organizations.