The book was released last week and has attracted widespread controversy, with Liverpool manager Brendan Rodgers condemning the former Red Devils boss over his criticism of captain Steven Gerrard and Jordan Henderson.
The Scot maintains the book was written solely for the Old Trafford faithful as a way of finally revealing the truth for those that have questioned his previous decisions and choices.
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“The book is to make people understand how difficult the [Manchester United] job is. It's a massive club, the biggest in the world, and that expectation is always there."
Following 26 years in charge of United and a 13th Premier League trophy, Sir Alex retired from football at the end of last season and former Everton boss, Daivd Moyes was appointed his successor.