For those who won't buy it because they don't want to line Tony's pockets - he has pledged all of his payments from the book (including the advance) to the RBL. He won't get anything from it.
I plan to read it and will probably buy it. In his early years he did a significant amount of good. Having lived through the Thatcher years living in Yorkshire, he was a breath of fresh air. However I suspect anyone could have won the election of '97 if they had been a labour leader.
His latter years are dominated by the Iraq and Afghanistan wars. The legality of both are dubious but we are helped with hindsight. The biggest crime with Iraq was the total lack of planning for after the invasion. However we were always going to join in the war after Bush Snr. and Thatcher had stopped at the gates of Baghdad in Gulf War I. Both major parties supported the war - and given that we the public had voted them in - we get what we deserve.
You could claim that most of our major leaders are criminals. Churchill was no saint, Thatcher was a war criminal for some of the actions in the Falklands and remember that we invaded Egypt back in the 1950's to grab Suez to satisfy Anthony Eden
Blair was no worse than lots of them and may have been better. However until we have had time to reflect on his time in office we cannot rationally compare his Premiership.