I haven't read Georgie-Porgie's memoir yet, but I've read news stories, excerpts, and have seen the highlights/lowlights of book-flogging reputation-hoping interviews on TV. I made some comments here on the Register's Orange Punch blog. One of the main things I wanted to stress was that Bush keeps getting away with the outright lie that Saddam kicked out the UN weapons inspectors and that helped to precipitate the decision to invade. Pure untruth.
The weapons inspectors were given free rein and kept begging U.S. intelligence services to come forward with the info on which political leaders were making scare remarks like not wanting the smoking gun to be a mushroom cloud. The intel services didn't come forward because there was no such information. In the end, the U.S. advised the weapons inspectors to pack up their instruments and leave a couple of weeks in advance of the invasion, which was inevitable not matter what the inspectors did or didn't find. The WMD allegations, as even Wolfowitz admitted, were what the planners thought would most alarm the public and that the public might buy.