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The Enemy Within: A History of Espionage

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To gain the upper hand in conflict the ability to know what your enemy is planning is vital. Massive amounts of money have been spent and many lives have been lost in pursuit of this objective. From biblical times to the present day, leaders have employed espionage on and off the battlefield in the quest for victory. Tactics might differ, from dirty tricks and theft to interrogation and torture, but the aim is the same - to outmanoeuvre your enemy and emerge triumphant. Separating myth from reality, the Enemy Within, traces the history of espionage from its development in ancient times through to the end of the Cold War and beyond, shedding light on the clandestine activities that have so often tipped the balance in times of war. This detailed account delves into the murky depths of the realm of the spymasters and their spies, revealing many amazing, and often bizarre stories, along the way. From the Monkey hanged as a spy during the Napoleonic wars to the British Double Cross Committee in World War II and from Ivan the Terrible's forming of the first Russian secret police in the 16th century to the infiltration of the IRA in the 20th century, this journey through the history of espionage shows us that be they thrill seekers or madmen, fanatics or tricksters no two spies are alike and their fascinating stories are fraught with danger and intrigue.


CHAPTER HEADS In ancient times. Through dark ages. Spy, Britannia! Espionage in the Age of Reason. Vive la revolution! Napoleon's 'secret part'. Uncivil war. The godfather of secret service. Spy fever. Double-cross agents and radio games. Axis spies against America. Spies of the Soviet era. With no end in sight.

368 pages, Hardcover

First published October 31, 2006

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129 people want to read

About the author

Terry Crowdy

31 books11 followers
Terry Crowdy was born in London in 1970. Initially a re-enactor, his interest in the Revolutionary and Napoleonic Wars led to writing for specialist magazines, and then to book authorship.

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5 stars
9 (14%)
4 stars
22 (34%)
3 stars
24 (38%)
2 stars
3 (4%)
1 star
5 (7%)
Displaying 1 - 12 of 12 reviews
Profile Image for Melissa McShane.
Author 94 books860 followers
June 4, 2018
The information Crowdy presents is interesting, but the style is so dull I found my attention slipping. Recommended as a reference work--look up the spy you want to know about, but I can't suggest reading it for pleasure.
Profile Image for Debbi Mack.
Author 20 books139 followers
June 2, 2018
An excellent and thorough overview of spycraft throughout history.

Not one I'd recommend unless you're very interested in the subject. But this comprehensive historical reference book reads, at times, like a spy thriller.

If history, politics, and spying interest you, this is one fantastic book to read!
Profile Image for Linus Williams.
111 reviews1 follower
November 15, 2023
I really wanted to like this book--it's about a subject I find quite fascinating. And indeed, the book starts off well. However, in the middle, it really is quite a drag to read. Perhaps I'm not the target audience to hear about the intricate court politics of Revolutionary and Napoleonic-era France, but my God that was a slog. We are introduced to snippets of people we have never heard of, who never show up again, and expected to keep many players straight. I frequently flipped back and forth to try to keep track of various dramatis personae. The book does pick back up in WW2 and cold war espionage, and I really almost wish there were more space devoted to these more recent spying episodes. It then falls on its face once again in the epilogue, talking about Israeli/Mossad secret actions.

It's not a 2-star, but that's only because I forced myself to finish it.
Profile Image for Denise.
7,521 reviews137 followers
August 17, 2018
From the earliest recorded examples from myth and history through to the end of the 20th century, this was an interesting and very readable overview over the history of espionage, touching on a wealth of different stories and events. While due to the breadth of subtopics covered, the book doesn't offer all that much depth for each of them, it is an excellent starting point from which to move on to more in-depth works with a narrower focus.
Profile Image for Sophia.
Author 5 books402 followers
November 8, 2011
I chose this book because I needed to do some research and was not familiar with the subject matter. There is always that fine line between too technical and too vague to be helpful.

Not so with this book. I learned a great deal and found evidence of documentation and quotes from others. There is a handy list of sources by chapter and word index in the back. But it was easy to follow and well written. I became so caught up in the writing that I forgot to take notes for my research.

The book covers spying from ancient times to the present.

Recommend for interest or for research.
Profile Image for Lauren Albert.
1,834 reviews192 followers
February 28, 2013
What I walked away from this book was shock at how unbelievably stupid people could be--even in wartime. General X: "Well, you seem to be a nice, well-brought up young man. Why don't I give you a tour of our weapons facility." Okay, well, the dialogue is my own but the idea is for real. A fun, if scary, look at espionage across cultures and ages.
Profile Image for John.
69 reviews
August 20, 2014
Finally got through this book. Not because it wasn't good, but just because of my own schedule and whims. It really was an interesting look at the history of spying.
Profile Image for Angela Maria Hart.
199 reviews353 followers
January 5, 2016
This book is really interesting, concise, well-researched, and well-written. If you ever want to learn about the history of espionage this will be your go-to book.
Profile Image for Becca.
71 reviews18 followers
January 18, 2014
An excellent engaging and well written book, stylisitically pleasing to the layman and historian alike.
Displaying 1 - 12 of 12 reviews

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