In May 2013, arguably the best football manager of all time, Sir Alex Ferguson, retired after a remarkable career that spanned four decades and delivereed 49 major trophies.
But is he the greatest?
From the philosophic 'total football' coasching methods of Rinus Michels and Johan Cruyff; to the expansive ultra-attacking, yet disciplined models instilled by Louis Van Gaal and Pep Guardiola; the uncompromising 'catenaccio' defensive styles of Helenio Herrera; to the team-building expertise of Arrigo Sacchi, many of the greatest manbagers to have liveed are showcased, scrutinised and celebrated in this book.