They helped invent the bar code They revolutionized business schools & created the corporate practices that now rule our world Mc Kinsey employees are trusted & distrusted loved & despised They are doing behind-the-scenes work for the most powerful people in the world & their ranks of alumni include the chairman of HSBC & William Hague Renowned financial journalist Duff Mc Donald uncovers how these high-priced business savants have ushered in waves of structural financial & technological shifts but also become mired in controversy across the years Discover how the firm celebrated Enron's disastrous corporate structure & how they've been instrumental in the government's controversial NHS reforms Are they worth their astronomical fees? & what do firms & governments actually get for their money? Based on exclusive interviews with key Mc Kinsey players & written in gripping prose this is a revealing window onto one of the most secretive & powerful companies in the world