Ever since Ferguson signed off his 27-year reign at Manchester United with that memorable 5-5 draw at West Brom, all the talk had been of the Scot undergoing something of a personality transplant.
The days when a snarling Ferguson used to condemn his subjects in to silence with one icy look were gone.
Close acquaintances talked of a man who had cut himself off from football. Cruises, horse races and hip replacements were more his thing now.
But while this might be true, there was no chance that Ferguson would allow himself to drift out of football without giving his enemies one last pasting.
If one message can be taken from Ferguson's time at United, it should be that no-one was bigger than he was.
He might let the odd discrepancy go by, but any sign of total disregard for him, then you are on your bike.
Ferguson once described the 2003 title run-in with Arsenal as "squeaky bum time", and there is little doubt that Ferguson's adversaries will have been going through the same emotions on Tuesday morning, when a few copies were released to the press.
Some of the very players he had helped turn in to stars - Roy Keane, Wayne Rooney, David Beckham, Ruud van Nistelrooy, Gabriel Heinze and Jaap Stam - were in the firing line while Arsenal manager Arsene Wenger and any number of people associated with Liverpool or Manchester City were putting on the Kevlar ready for the hail of bullets that could be coming their way.
Some get off lightly. Ferguson, fearing the potential shockwaves that could travel up to Manchester from today's launch in London, did not reveal anything we did not already know about Rooney and his two failed attempts to leave United.
Wenger, now a "very close friend", also gets off practically scot free despite years of feuding between the pair.
But Keane, Rafael Benitez, Van Nistelrooy and, to a lesser extent, Beckham, are not spared. Ferguson even finds time to blast a hail of bullets at Mark Bosnich and Owen Hargreaves. Predictably, the Football Association is not spared either. And Peter Kenyon gets some stick, as does Rooney's agent Paul Stretford.
This is when the book comes to life. Yes, the moment where Ferguson talks about informing his squad of his departure pulls at the heart strings. The introduction, where Ferguson talks about the heartbreak his wife Cathy suffered when losing her sister to cancer, is almost tear-jerking.
But the reader's pulse only starts racing when they become a witness to the savage literary beatings he hands out to his subjects.
Beckham - boot to the head after pursuing a celebrity lifestyle; Keane - cut free after becoming too big for his boots; Bosnich - lazy and fat; Hargreaves - terrible buy; Van Nistelrooy - trouble-causer who agitated for a move; Steven Gerrard - "not a top player".
These are the most enjoyable moments, by far.
Ghostwriter Paul Hayward does brilliantly in putting the reader at the scene of the outbursts, the rows, the highs and the lows.
The contents of the book, which spans from 2000 to the present day, make for compelling reading.
It is like no other autobiography simply because no-one in the history of football has gone through what Ferguson has. There will not be another book like this one, so enjoy it.