"Ten years on there is a lingering sense that the nation and the world have been let down, deprived of the right to know  deceived, even," conclude the authors of this comprehensive study. Their main charge is that the US intelligence agencies and the Bush administration were inept and evasive and betrayed the American people. Unwilling to publicly acknowledge that the Israeli-Palestine conflict was a key motivation for the attacks, they instead shifted the blame and attention to Iraq. Summers and Swan also argue that the 9/11 Commission was misled and overlooked crucial evidence; and they state bluntly that it "blurred the truth about the Saudi role", the possibility that the hijackers were funded by Saudi princes. This is an intensively researched narrative reconstruction of all the known facts. If much of it is familiar and none of it original, it nevertheless remains a highly readable overview of everything we know so far. If it is not strictly definitive, it is because so much information remains classified.