Start reading The Secret Sentry on the free Kindle Reading App or on your Kindle in under a minute. Don't have a Kindle? Get your Kindle here.

Deliver to your Kindle or other device

Enter a promotion code
or gift card

Try it free

Sample the beginning of this book for free

Deliver to your Kindle or other device

Anybody can read Kindle books—even without a Kindle device—with the FREE Kindle app for smartphones, tablets and computers.
Sorry, this item is not available in
Image not available for
Image not available

To view this video download Flash Player


The Secret Sentry [Kindle Edition]

Matthew M. Aid
4.0 out of 5 stars  See all reviews (53 customer reviews)

Digital List Price: $11.99 What's this?
Print List Price: $30.00
Kindle Price: $9.39
You Save: $20.61 (69%)

Whispersync for Voice

Switch back and forth between reading the Kindle book and listening to the Audible narration. Add narration for a reduced price of $3.99 after you buy the Kindle book.


Amazon Price New from Used from
Kindle Edition $9.39  
Hardcover $21.66  
Paperback --  
Audible Audio Edition, Unabridged $21.95 or Free with Audible 30-day free trial
Kindle eTextbooks
Save up to 80% with Kindle eTextbooks
Textbooks cost less when you rent or buy feature-rich eTextbooks. With flexible rental options, only pay for the time you need. Choose a rental length between 30 and 360 days and extend it for as little as one day. You even have the option to purchase at any time. Learn more.

Book Description

In February of 2006, Matthew Aid's discovery of a massive secret historical document reclassification program then taking place at the National Archives made the front page of the New York Times. This discovery is only the tip of the iceberg of Aid's more than twenty years of intensive research, culled from thousands of pages of formerly top secret documents. In The Secret Sentry, he details the untold history of America's most elusive and powerful intelligence agency, the National Security Agency (NSA), since the end of World War II. This will be the first comprehensive history of the NSA, most recently in the news with regards to domestic spying, and will reveal brand new details about controversial episodes including the creation of Israel, the Bay of Pigs, the Berlin Wall, and the invasion of Iraq. Since the beginning of the Cold War, the NSA has become the most important source of intelligence in the US government: 60% of the president's daily briefing comes from the NSA. Matthew Aid will reveal just how this came to be, and why the NSA has gone to such great lengths to keep its history secret.

Editorial Reviews


"This, very simply, is the most informative book ever written on the inside bureaucratic struggles and the outside operations of the National Security Agency. Matthew Aid is our reigning expert on the NSA."—Seymour M. Hersh, author of Chain of Command: The Road from 9/11 to Abu Ghraib

“NSA analysis now comprises as much as 60 percent of the president’s daily intelligence briefing, and Aid provides a critical history of the agency that has the ear of the leader of the free world. A sprawling but revealing look at a powerful, shadowy agency of the American government.”Kirkus

About the Author

Matthew M. Aid is a leading intelligence historian, expert on the National Security Agency, and regular commentator on intelligence matters for the New York Times, the Financial Times, the National Journal, the Associated Press, CBS News, NPR, and many other media outlets. He lives in Washington, D.C.

Product Details

  • File Size: 2181 KB
  • Print Length: 433 pages
  • Page Numbers Source ISBN: 160819096X
  • Publisher: Bloomsbury Press (July 1, 2009)
  • Sold by: Amazon Digital Services, Inc.
  • Language: English
  • ASIN: B002WOD8X8
  • Text-to-Speech: Not enabled
  • X-Ray:
  • Lending: Enabled
  • Amazon Best Sellers Rank: #143,927 Paid in Kindle Store (See Top 100 Paid in Kindle Store)
  •  Would you like to give feedback on images?

Customer Reviews

Most Helpful Customer Reviews
87 of 91 people found the following review helpful
5.0 out of 5 stars The National Security Agency Exposed July 7, 2009
The Secret Sentry is an extraordinary book, providing much more information about the activities of the National Security Agency (NSA) then was previously available. Some people will know that the NSA history unit has recently released volumes of material on aspects of the history of the agency. In some measure these releases were due to Matthew Aid, the author of the book. Matthew served in the old Air Force Security Service, one of the service arms of NSA. He has experience inside the system but has done extraordinary research in the records held by the National Archives and Records Administration facility at College Park. The quality of his efforts have been so good that other people, once they became aware of his endeavors, who worked in the NSA world have shared experiences with him. Matthew discovered that the people who were supposed to cull records before they were transfered to College Park missed a lot of documents. He also learned to effectively use the Freedom of Information Act to nudge documents out of NSA and other intelligence organizations. The net result is a work that provides more insight into the operations of the Signal Intelligence (SIGINT) community than has been available before. It is an up and down story with both successes and failures. But the important insight that emerges is that SIGINT often has provided the greatest volume of material used by the services, other intelligence agencies, and the White House. During the Vietnam War much of the intelligence that the military and political structure used to fight the conflict came from SIGINT. Also, there were times when NSA broke into Russian communications, although not often enough. Matthew provides an surprising amount of information on the use and misuse of SIGINT from the Gulf War to the present. Read more ›
Was this review helpful to you?
29 of 30 people found the following review helpful
4.0 out of 5 stars Almost The Best Possible Work on the Subject September 12, 2009
Format:Hardcover|Verified Purchase
Aid's Secret Sentry is a remarkable effort of research, persistence, writing, and most important: timing. His footnoting is impressive and he was prudent enough to wait until Tom Johnson's authoritative four volume classified history of NSA was (partially) declassified and posted by the National Security Archive to finish his own volume. His debt to Johnson shows in his footnotes. For years, Jim Bamford's "Puzzle Palace" and "Body of Secrets" were the only real public sources on NSA, but Matthew Aid has now surpassed him in all areas but one: the evolution of technology and NSA's role in creating the modern electronic and computer world. For that you still need "Body of Secret's" chapter fourteen. Unlike Bamford's breezier works, this is not a "popular" book, but for anyone genuinely interested in the real story of this essential component of national security, Aid's account of the United States codebreaking and communications intelligence effort is essential and will not soon be bested.
Comment | 
Was this review helpful to you?
32 of 35 people found the following review helpful
3.0 out of 5 stars Well-Done History of Fascinating Organization October 13, 2009
By zorba
This is the most comprehensive history I've read about the NSA, but if it has a fault, it is what seems to be a slight tendency to overplay the agency's failures and underplay its many successes. However, the agency, faced with a Herculean -- arguably impossible -- task comports itself pretty well throughout the book. Also, the author seems to suffer from the same problem the agency does: far more information than he can process in a book of some 400 pages, almost a hundred pages of which are footnotes. But, I found it mostly interesting -- riveting in a few spots -- but Aid tried to do too much here. For instance, I think he would have had a better book if he had cut way back on the details about NSA's tactical role in the Iraq and Afghanistan wars. I wish he had gone into more detail about how the agency processes the enormous amounts of information it takes in, especially since he cites that as one of the major problem areas facing the NSA and, in fact, may be the one problem that may doom it. I always get a sense of dread when journalists write about our intelligence organizations because the articles or books often turn into political diatribes or they give away too much information that could be useful to our foes. I must say that Aid, unlike some others who write about NSA and seem to have a political agenda, mostly resists this unacceptable trend. "Mostly," I said. But, all in all, it's a pretty good book.
Comment | 
Was this review helpful to you?
12 of 13 people found the following review helpful
2.0 out of 5 stars A tough topic, but a poor effort May 19, 2013
Format:Kindle Edition|Verified Purchase
The NSA isn't an easy topic to write about. It is not an agency that normally seeks attention, and works hard to avoid publicity or disclosure of its activities. So in some sense I admire Matthew Aid for even taking a shot at a history of the NSA.

=== The Good Stuff ===

* The book is well-researched and has plenty of supporting material included. It may actually go too far, roughly a quarter of the book is notes and references.

* There are some indications of the NSA's successes. There is brief mention of Operation Ivy Bells, where an undersea cable carrying Soviet intelligence was tapped and monitored. There were also some information on the NSA's successes in cracking the encoded transmissions of other countries.

=== The Not-So-Good Stuff ===

* The author seems to have a bias against the NSA. As an example, in one case the author describes how a certain operation only "served to 'tick' off the North Vietnamese off". Well maybe so, but wasn't that the idea?

* The book doesn't discuss the lower level details of the NSA operations. There is no mention of how any of the code-breaking was done, how satellites captured radio transmissions, or any other technical details. Neither was there any high-level details of the political, strategic or tactical consequences of any NSA operations.

In fact there was nothing in the book other than a series of brief overview of NSA activities. Msjor events in the world, such as the bombing of the Marine Barracks in Lebanon receive nothing more than a few paragraphs describing that the NSA received some inkling of the attack, but were unable to convince anyone of the seriousness of the threat.
Read more ›
Comment | 
Was this review helpful to you?
Most Recent Customer Reviews
5.0 out of 5 stars Five Stars
Published 18 days ago by Kindle Customer
2.0 out of 5 stars Two Stars
Just not what I was looking for.
Published 26 days ago by Gerald E. Templin
5.0 out of 5 stars Five Stars
an eye opener
Published 27 days ago by James Shufeldt
5.0 out of 5 stars Lot's of background information
without taking a right or wrong approach ,the author spells out the actions and decisions made in the different wars. Read more
Published 1 month ago by David M. Olson
1.0 out of 5 stars OUT OF DATE VOLUME WITH PRO-U.S. COLD WAR SLANT. Uninformative
Superficial, out-of-date, irrelevant. The author is clearly a cold-warrior. Book is a waste of time unless one wants to have reprised old ideas about America's role in the world
Published 1 month ago by Barry For Good Government
5.0 out of 5 stars The Secret Sentry: The Untold History of the National Security Agency
This was a work related purchase. I do not have a point of view on it, buit I'm sure my boss was happy with it.
Published 3 months ago by Nancy P. Ronga
4.0 out of 5 stars Pretty good and thorough. Oddly organized.
So I liked the book and recommend it. I thought it provided some rather frank assessments and good details. Read more
Published 7 months ago by Anthony M. Mutti
5.0 out of 5 stars Inside look at another world
This book enables the average reader to understand the long course of surveillance and that it's nothing really new except that it was previously used mostly on foreign groups and... Read more
Published 7 months ago by Merica Saint John
1.0 out of 5 stars Why is this never mentioned?
While serving as a Russian linguist in the United States Air Force in the United Kingdom in 1985, Aid was court-martialed for unauthorized possession of classified information and... Read more
Published 7 months ago by Angela K Miller
I don't think much of it because it doesn't deliver. I should have held on to my money, and you should too.
Published 8 months ago by Mervyn O. Hagger
Search Customer Reviews
Search these reviews only

More About the Author

Discover books, learn about writers, read author blogs, and more.

What Other Items Do Customers Buy After Viewing This Item?


There are no discussions about this product yet.
Be the first to discuss this product with the community.
Start a new discussion
First post:
Prompts for sign-in

Look for Similar Items by Category