“The Puzzle Palace” is the title by James Bamford.
According to the NYT: “Mr. Bamford traces what was happening inside the agency as the 9/11 hijackers arrived in the United States and made preparations for the attack. Some were living in Laurel, Md., home to thousands of agency employees.”
Part of the review off Amazon notes:
“Bamford backs his serious historical and technical material (this is a carefully researched work of nonfiction) with warnings about how easily the NSA’s technology could work against the democracies of the world. Bamford quotes U.S. Senator Frank Church: “If this government ever became a tyranny … the technological capacity that the intelligence community has given the government could enable it to impose total tyranny, and there would be no way to fight back, because the most careful effort to combine together in resistance to the government … is within the reach of the government to know.” This is scary stuff.”
USA Today provides a lengthy article that gives a bit of background on this whole thing.
Penguin is the publisher, and the book finishes at over 650 pages.
Note the date on this article may be incorrect due to importing it from our old system.