You bet.... and there is a book... I believe it is Why America Slept...
Author: Did Saudis know of 9-11 plot?
http://www.posner.com/articles/ap%20wire%20on%20was%209.2.03.htm>>By RICHARD PYLE
Associated Press Writer
September 2, 2003
NEW YORK -- A top al-Qaida operative in U.S. custody has revealed that key Saudi Arabian and Pakistani figures had prior knowledge of the Sept. 11 terrorist plot against the United States, according to a new book.
In "Why America Slept: The Failure to Prevent 9/11," author Gerald Posner also says three Saudi royal princes who had contacts with the terror network died unexpectedly within a week last year, and a Pakistani military officer was killed seven months later.
While he concedes that the deaths could be "coincidences," Posner says, they occurred after the CIA had passed along to Saudi and Pakistani officials information it had obtained from Abu Zubaydah, a key associate of al-Qaida leader Osama Bin Laden.
"My gut tells me that if Zubaydah's information was accurate, our error was telling the Saudis what we had," he said in an interview. "People did not want them to talk, and took them out. Can I prove it? No."
Two of the subjects, Saudi Prince Ahmed bin Salman bin Abdul Aziz and Pakistani Air Marshal Mushaf Ali Mir, "knew that an attack was scheduled for American soil" on Sept. 11, 2001, but did not know where, when or any other details about which to warn U.S. officials, Posner writes.<<
http://www.telegraph.co.uk/news/main.jhtml?xml=/news/2003/09/01/wsaud01.xml&sSheet=/news/2003/09/01/ixworld.html>>Why America Slept, by Gerald Posner, claims that Zubaidah resisted CIA interrogation, despite the use of "quick-on, quick-off" painkillers and truth drugs.
Posner describes how, in an attempt to frighten Zubaidah, he was moved to a fake Saudi interrogation chamber, manned by Arab-American special forces masquerading as Saudi police.
"His reaction was not fear, but utter relief," Posner writes. Zubaidah recited telephone numbers for one prince, informing the fake Saudis the prince would "tell you what to do".
The effect of Posner's claims may be largely diplomatic: there is no corroborating evidence for his claims, and the prince died of a heart attack, aged 43, last year.
>>Two other princes named in the book as al-Qa'eda paymasters also died within a week of Prince Ahmed.<<