The End Of The Party - Andrew Rawnsley Was a great dissection of the post-9/11 New Labour era up to the Coalition. Very readable and obviously covers Iraq and the related controversies, but also the Blair/Brown relationship and its overall draining effect on what had previously been one of the most popular governments in modern times.
The passage that sticks with me is when even Dubya questions why Blair is sticking with him joining in the war, effectively giving him an out, and Blair says he's in with this war all the way.