That motive was so weak. Although it's good to hear another (ex) US congressman talk about the saudi connection, to imagine that the House of Saud would plan & execute 9/11 on their ally & largest Oil customer because Bin Laden threatened them seriously strains credulity. Nevermind that Bin Laden was a CIA asset at the time, he was still a cave dweller in a far-away country that must be seen as extremely backwards from the Saudi royals. To them, Bin Laden would have been about as scary as Borat is to Obomba.
Also, the fact that Sen Bob Grahm wrote that book about this exact subject so in-depth pretty much means that this subject matter cannot be surprising to other congressmen, & therefore IS NOT the full range of these 28 pages. There has to be more that just "Saud had a role."
I won't get my hopes up and dream that a link to the whitehouse is in it, but it sounds like whatever they're going to release is going to change more than simply the amount of oil we buy from the Saudis.